【本讲教育信息】
一. 教学内容：
Unit 2
DNA (Lesson 9—Lesson 12)
1. 重点单词。
n.
mule
donkey
blueprint
twin
clone
egg
insect
v. combine
identify
clone
divide
design
damage
adj.
juicy
helpful
identical
original
adult
adv. exactly
2. 重点短语。
human
being 人类
except
for 除……之外
not only…but also…
不但……而且……
at the same
time 同时
What
if…? 如果……将会怎么样？
for
example 例如
3. 交际用语。
Ability and
Inability.
He can ride a
bike.
Brian is good at
football.
Scientist can take DNA
from one kind of animal.
They can’t combine their
DNA.
How far can you
jump?
Can I take a plane to
the bakery?
二. 重点、难点解析及词语辨析。
1. I would combine a donut and a
pizza.
我想组合一个面包圈和一张比萨饼。 （L9）
combine v.
（使）联合，（使）结合
①We should combine theory with
practice in our study.
在学习中，我们应该把理论和实践相结合。
②The two small shops combined to
make a large one.
这两个小店合并起来成为一个大商店。
注意：combine 着重指“结合为一”，而connect指不紧密的“联系”，
被联系者仍保持着自己的特性。
③Britain and France are
connected by an undersea tunnel.
英国和法国被一条海底隧道连接起来了。
2. I think I would combine grapes
and bananas.
我认为我应该组合葡萄和香蕉。 （L9）
would 是 will 的过去式，指过去，也可指现在，语气较缓和、委婉。
①表示意愿（主要用于第一人称，常用于间接引语，指过去的将来）。
If you would stand by
me, I should have another try.
如果你肯支持我，我就再试一次。
②表示过去习惯或反复发生的动作。
During the vacation he
would visit me every
week.
放假期间，他每周都来看我。
③表示请求、建议（用于疑问句）比will委婉、客气。
Would you like to visit
the Palace Museum?
你想去参观故宫博物院吗？
3. I could have breakfast and lunch
at the same time.
我可以把早饭和午饭同时解决。 （L9）
at the same time 同时，然而，但是
①This is a difficult problem, at
the same time it is very interesting.
这是个很难的问题，但却很有趣。
②They arrived at Shanghai at the
same time.
他们同时抵达了上海。
4. I would call them “grananas”. 我要叫它们“grananas”。(L9)
call+宾+宾补（宾补常为名词）“称呼；叫做”
①His friends call him Joe. 他的朋友称他为乔。
②He called from downstairs. 他在楼下喊叫。
③I’ll call on you tomorrow. 我明天来拜访你。
④He said he would call at noon. 他说他要在中午打电话。
提示：△call vt. “喊叫；叫醒”
⑤Call me at six tomorrow morning
if I’m still sleeping.
如果我明早六点还睡着，你就叫醒我。
△call + 宾；或call + 间宾 + 直宾；
或call + 直宾 + for + 间宾，“呼唤；召唤；召集”
⑥Mother is calling me. 母亲在叫我。
⑦The headmaster called all the
teachers to a meeting.
校长召集全体教师开会。
⑧Please call me a taxi. (=Please
call a taxi for me.)
请给我叫一辆出租汽车。
5. What if you could combine other
animals or plants to make something new?
如果你能组合其他的动物或植物成新的东西怎么办？ （L9）
What
if…? “如果……该怎么办呢？如果……又有什么关系？”
①What if you should fail? 假如你失败了该怎么办呢？
②What if they succeed? 假如他们成功了又有什么关系？
6. Are
there difference between you and him?
你和他之间有不同吗？ （L10）
辨析：between 与 among
between 常用于两者之间，among 一般指三者或三者以上，
如果指三个以上的人或物的每两个之间时，仍然要用between。
①I sit between Lily and Jenny. 我坐在莉莉和詹尼之间。
②They live among the mountains. 他们住在群山之中。
7. You use it to build a
house. 你用它来建房子。 （L10）
use 的用法
①use…to do sth. = use… for doing
sth. 用……做某事
He is using a knife to
cut bread.
= He is using a knife
for cutting bread.
他正用小刀切面包。
②It is no use doing ( to do )… 做……是无用的（无益的）
It is no use crying over
spilt milk.
不要为打翻的牛奶哭泣。（错误已铸成，悔之无益）
注意：use n.
用途 This knife is no
use.
useful adj.
有用的 This is
an useful
book.
8. Except for
identical twins, each living thing has its own unique
DNA.
除了双胞胎之外，每个生物都有自己的DNA.
(L10)
※except for “除……以外，只是”, 常放句首，排除不同类的。
except 可放句中。排除同类。
①He is a good man except for hot
temper. 除了脾气暴躁外，他是个好人。
②Your article is quite good
except for several spelling mistakes.
你的文章很好，只是有几处拼写错误。
③Everybody is here except Li
Lei. 大家都在，除了李雷。
※ 辨析：every
与 each
every 与 each 都可与单数名词连用，且意义相近，表示“每个”，
但是every 强调整体，each 则表示个别。
如果不特别强调某一意义时，every和 each 可以互换。如：
①We want every child to succeed.
我们希望每个孩子都成功。
②Each child will find his own
personal road to success.
每个孩子将会找到他个人的成功之路。
Each 可以指两个或两个以上的人或东西，every 却不能指两个，只能指三个以上的数量。
另外，如有其他限定词同时修饰中心词，each 可作代词取 each of 的形式，而every 则只能做限定词。如：
③Each of my parents gave me
presents for Christmas.
过圣诞节时我父母每人都给了我礼物。
9. not only…but
also…不但……而且……，连接两个相同的成分，也可连接两个分句。
△连接两个并列主语时，谓语动词和后面主语保持一致；
△连接两个并列分句，not only 置于句首，通常用倒装句结构，也就是说，把not only引导的分句中的助动词或be 提到主语前面。
①He likes not only English but
also math.
他不仅喜欢英语，而且喜欢数学。
②Not only you but also I am a
teacher.
不仅你而且我也是一名教师。
③Not only does he work hard, but
also he is very clever.
他不仅工作认真，而且很聪明。
10. From your DNA, scientist can
identify not only you but also the people related to you.
通过你的DNA,科学家不仅能够辨认出你还可辨认出和你有关的人。 （L10）
relate
to 涉及，有关
①The story is related to the
Second World War. 故事讲的是第二次世界大战的事情。
②I have a book relating to the
Autumn Harvest Uprising.
我有一本关于秋收起义的书。
11. After a person or animal has
died, we cannot clone
them.
当一个人或一只动物死了之后，我们不能克隆他们。 （L11）
die 是动词，意思为“死、死亡”，是一个瞬间动词，不能与一段时间连用。
①My grandpa died two years ago. 我爷爷两年前去世了。
②The fish will die without
water. 离开水鱼会死去。
拓展：death 是名词，意思为“死亡、去世”。
The memorial hall was
built one year after his death.
他死后一年，纪念馆建成了。
①dying 是 die 的现在分词，用作形容词，意思是“垂死的、即将死去的”。
The poor dog had no
food, it was dying. 可怜的狗没有食物，快要饿死了。
The dying father wanted
to see his son. 那个垂死的父亲想见见他的儿子。
②dead adj. 意思为“死了的、无生命的”，表示状态，可以与一段时间连用。
The tree has been dead
for ten years. 这棵树死了有十年了。
The rabbits are all
dead.
这些兔子都是死的。
She looked at her dead
cat sadly. 她伤心地看着她死去的猫。
12. We can divide a growing egg in
half. (L11)
divide vt.
& vi. (常与in, into 连用)分开；划分
Let’s divide ourselves
into several groups. 我们分成几个小组吧。
How shall we divide up
the labour in the work? 我们怎样分工？
注意：divide 和 separate 均表示“分开”
divide 指的是把人或物分成若干份，常与介词into 连用；
separate 指的是将一个整体的物品分开或将两个靠近的物品分开，
使其不在一起，常与介词from 连用。
①Let’s divide these books into
ten parts. 我们把这些书分成10份吧。
②A fence separated the cows from
the pigs. 围栏把奶牛和猪分开了。
13. else 的用法
else 表达“其他的，其余的”的含义，通常用在不定代词（something,
anything, nobody, somebody, nothing等）或疑问代词（what, which , who 等）之后。
①Do you want something else? 你还想再要点别的吗？
②I am the only person here，there is nobody else. 只有我在这儿，再没别人了。
③What else do you want? 你还想要什么？
④Who else will be here? 还有谁会来？
提示：else 与 other 都可以表示“别的”。但是other 修饰名词，位于名词的前面；
else 修饰不定代词、疑问代词或疑问副词，必须位于这些词之后。
⑤What’s that in your the other
hand? 你的另一只手里拿着什么？
⑥Do you have anything else to
say? 你还有别的事情要说吗？
⑦Who else can play the piano? 还有谁会弹钢琴？
【模拟试题】（答题时间：50分钟）
一．单项选择。
1. ________ interesting the news is
!
A.
How an B. What an C. How D. What
2.
Call a taxi,______________ you will miss the train.
A.
and B. though C. because D. or
3. Can
you tell me __________ she is waiting for?
A.
why B. whose C. whom D. which
4.
This box is ________ heavy________ I can’t carry it.
A.
too; to B. so;
that C. very;
that D. too; that
5. —Is it your ticket？
—No,
_______ is in my pocket. It’s ________.
A.
mine; her B. my;
his C. mine; hers D. my; hers
6. —She is too busy to help us
finish the work.
—Let’s
do it__________.
A.
herself B. my
self C. ourselves D. itself
7. The
old woman kept one black dog and two white__________.
A.
one B. ones C. those D. one’s
8. We
should keep _________ in the reading room.
A.
quiet B. quietly C. quite D. quickly
9.
Which is ________ to learn, fishing or swimming?
A.
easy B. easier C. the easier D. more easily
10.
Jim has made many friends since he ________ to China.
A.
came B. comes C. has come D. will come
11.
They__________ all their money, so they have to walk home.
A.
spend B. had
spent C. have
spent D. will
spend
12.
Henry___________ be at home because he phoned me from the farm just now.
A.
mustn’t B. isn’t
able to C. may
not D. can’t
13.
What would you like to ________ us about your hometown?
A.
speak B. talk C. say D. tell
14. We
could see nothing because the lights suddenly_________.
A.
went on B. went
over C. went down D. went out
15. —When _________ this kind of computer
________?
—Last
year.
A.
did; use B. was;
used C. is; used D. are; used
16. I
really don’t know ___________ about it.
A.
what to do B. how
to do C. to do
what D. how can I
do
17.
Peter could hardly see the words on the blackboard,______________?
A.
did he B.
couldn’t he C.
didn’t he D.
could he
18.
The market isn’t far from here. It’s only_________ bicycle ride.
A.
half an hours’ B.
haft an hour’s
C.
half an hour D.
an hour and a half
19.
She has been in Tianjin for ten years. Tianjin has become her second__________.
A.
family B. house C. home D. room
20.
____________ India and China are of___________ same continent.
A. / ； the B. The; the
C./ ； /
D. / ; a
二. 完形填空。
While
I was waiting to enter university, I saw in a newspaper a teaching job wanted
at a school about ten miles from where I___1___. Being very short of money and
wanting to___2___ something useful I applied (申请). Fearing
as I did so, that without a degree and with no ___3___ of teaching my chances
of getting the job were ___4___
However,
three days later, a letter ___5___, calling me to Croydon for a___6___with the
headmaster. It proved to be a___7___journey: a train to Croydon station, a
ten-minute bus ride and then a walk of at ___8___ a quarter of a mile. As a
result I arrived there, feeling___9___hot to be nervous. It was clearly the
___10___ himself that opened the door. He was___11___and round.
“The
school,” he said, “is made up of one___12___of twenty-four boys between seven
and thirteen.” I should have to___13___all the subjects except art, which he
taught himself. I should have to___14___the class into three groups and teach
them in turn at three different___15___, and I was disappointed at the thought
of teaching maths—a___16___at which I wasn’t very good at school. Worse perhaps
was the idea of___17___to teach them on Saturday afternoon because most of my
friends would be___18___themselves at that time.
Before I had time to
ask about my salary (薪水), he got up to his___19___. “Now,” he said,
“you’d better meet my wife. She is the one who really 20 this
school.”
1. A. lived B.
played C.
studied D.
worked
2. A. buy B.
do C.
teach D.
write
3. A. hooks B.
experience C. material D.
means
4. A. great B.
helpful C.
nice D.
tight
5. A. arrived B.
received C.
returned D.
written
6. A. match B.
meeting C.
quarrel D.
sight-seeing
7. A.
comfortable B.
difficult C.
pleasant D.
short
8. A. first B.
last C.
least D.
most
9. A. almost B.
so C.
too D.
very
10. A.
headmaster B. student C.
teacher D.
wife
11. A. bad B.
glad C.
short D.
smiling
12. A. class B.
dozen C.
group D.
score
13. A. like B.
practise C.
study D.
teach
14. A. connect B.
divide C.
join D.
tear
15. A. classes B.
levels C.
places D.
subjects
16. A. book B.
lesson C.
problem D.
subject
17. A. forcing B.
forgetting C. having D.
managing
18. A. enjoying B.
helping C.
studying D.
watching
19. A. feet B.
hands C.
letter D.
wife
20. A. likes B.
lives in C.
runs D.
starts
三. 阅读理解。
Once there were two brothers who were twins.
They looked exactly alike. They both had the same dark brown hair, blue eyes
and beautiful teeth. They were both 5’ 10" tall and both weighed 150 pounds.
They not only looked alike but also sounded
alike on the telephone. Not even their family could tell the difference.
They dressed alike, listened to the same music, and read the same books. They
even laughed at the same jokes.
When they were twenty-three ,they both got
married and a year later both had sons. The years went by and as they began to
grow old, they both wore glasses and finally they both became bald (秃头的). Then one day, one of the brothers got sick and died. A few days
later a man stopped the other twin on the street.
“Excuse me for asking,” he said, “but was it you
or your brother who died?”
l. It was not easy to tell the two men from each
other because _________.
A. they were brothers B.
they were handsome
C. they were at the same age D.
they were twins
2. The twin brothers ______.
A. looked very much alike B.
had different colored hair
C. looked like movie stars D.
wore different clothes
3. They both became bald means ___.
A. they became old B.
they had sons
C. they had little hair D.
they got sick
4.The only
difference between the twins was ________.
A. one was shorter than the other B.
one got sick and died
C. one got married and had a son D.
one was bald and the other wasn’t
5. The man
stopped the other twin on the street because______.
A. he wanted to talk with him B. he didn’t know which of them died
C. he wanted to make friends with him D.
he was surprised to see him on the street
【试题答案】
一. 1—5 CDCBC 6—10 CBABA
11—15 CADDB 16—20
ADBCA
二. 1. A 2.
B 3.
B 4.
D 5.
A
6. B 7.
B 8.
C 9.
C 10.
A
11. C 12.
A 13.
D 14.
B 15.
B
16. D 17.
C 18. A 19.
A 20.
C
三. 1. D 2.
A 3.
C 4.
B 5.
B