--Which play shall we go and see? ---- . A. I'm afraid we can't B. I don't think it's interesting C. Yes, I quite agree with you D. I'll leave it to you 题目和参考答案——青夏教育精英家教网—

As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. The question everyone asks is why anyone would want to clone flies in the first place. She hopes that the insects , which are very easy to experiment with , will help to adjust the cloning process in other animals and even in humans, where the technique is being researched to aid production of therapeutic (治疗的) stem cells.
In cloning, the DNA-containing nucleus of an adult cell is injected into an egg whose own nucleus(细胞核) has been removed. At the moment, the majority of cloned mice, sheep and other animals die before birth. It is thought this is because the adult DNA is not properly ‘reprogrammed’.
Using flies, researchers might discover genes that are important for this reprogramming, and that have matches in other animals. That is because it is relatively easy in flies to knock out the function of a single gene and then attempt cloning with these cells, which will test whether that gene is important. If such genes are confirmed, then in theory cloned mammalian embryos(晶胚) might be grown in selected solutions that change the activity of those genes to improve the technique’s success rate. Although some groups have attempted to clone insects before, Lloyd says this is the first time it has been successful. The team used a slight difference on the standard cloning process: they transferred nuclei taken from embryos rather than fully-grown adult cells. They sucked several nuclei (pl)out of developing fly embryos, and injected them into a fertilized(已受精的) fly egg. From over 800 early attempts, they cloned five adult insects, the group reports in the journal Genetics.
【小题1】The best title of this passage probably is _______.

A．The importance of clone

B．First insects are cloned

C．The disagreement in clone

D．The advantages of clone

【小题2】The scientists cloned flies because________.

A．there are fewer and fewer flies in the world

B．flies are easy to find and cheap to use

C．they can gain some experience before cloning other animals

D．it is safe to clone flies

【小题3】The failure of most cloned animals is due to _______.

A．the difference of other animals’ genes

B．the improper technique of clone

C．the complex of other animals

D．the improper rearrange of the adult gene

【小题4】It can be inferred from the last paragraph that ______.

A．the clone of insects before used grown-up cells

B．the clone of insects were never experimented before

C．this time scientists cloned flies successfully and easily

D．based on this success, other animals will be cloned in large quantities.

Below is adapted from a dictionary.
Water
▲Noun 1(a)[U] liquid without color, smell or taste that falls as ran, in lakes, rivets and seas, and is used for drinking, washing, etc: Water is changed into steam by heat and into ice by cold. ○drinking water ○ mineral water. (b)[U]this liquid as supplied to homes, factories, etc in pipes: The water was turned off for several hours a day during the drought. ○ hot and cold running water ○ [attrib] water shortages (c)[sing]mass of this liquid, esp a lake, river or sea: She fell into the water and drowned. ○ The flood water cowered the whole area. (d)[sing]surface of a lake, river, sea, etc: float on the water ○ We could see fishes under the water
2[U](exp in compounds)preparation containing water or sth similar to water: rose-water ○ soda-water
3 waters[pl](a)mass of water(in lake, river, etc)the (head-)waters of the Nile, ic the lake from which it flows(b)sea near a particular country: British waters ○ in home/ foreign waters 4[U]state or level of the tide: (at)high/low water
▲idioms he in /get into hot water(in formal) be in/get into trouble or disgrace: A person who
breaks a law can be in hot water with the police.
·cast one’s bread upon the waters(formal) do good make him drink you can give a person the
opportunity to do something but he may still refuse to do it.
·Still waters run deep a quiet or apparently calm person can have strong emotions, much
knowledge or wisdom.
·Blood is thicker than water Family is more important than anyone or anything else.
·Don’t throw the baby out with the bath water When deeds without expecting anything in
return:
·fish in troubled waters try to gain advantages for oneself from a disturbed state of affairs
·hold water(in formal)(of an argument, an excuse, etc)be capable of standing up to examination or
testing; be valid
·in smooth water(s) make even and easy progress: The business seems to be in smooth withers
there days.
·keep one’s head above water stay out of debt, difficulty etc: I’m managtag to keep my head
above water, though I am not earning much.
·pour oil on troubled waters (try to) calm a disagreement or violent dispute, etc
·water under the bridge event, mistake, etc that has already occurred and cannot be changed, so
there is no point in worrying about it.
verb [Tn] pour or sprinkle water on (sth): water a flowerbed, lawn, plant 2[Tn]give water to
(an animal) to drink 3[Tn] add water to (a drink )to dilute it: The owner of the pub was accused of
watering the beer.
Phrasal verb water sth down(a)make (a liquid)weaker by adding water(b)weaken the effect of
sth, eg by making the details less vivid: The criticisnts have been watered down so as not to offend
anybody.
▲Saying You can take a horse to water, but you can’t you are making a change, save what
matters to you and dispose of the rest
·It is no safe to wading in an unknown water it is dangerous for one to be involved in an
uncertain adventure.
·Too much water drowned the miller much gaining is good, but too much goes the opposite.
45．Fill in the blank in the sentence “If you’re caught cheating in the exam, you will___________.”
A．pour oil in troubled waters        B．be in hot water
C．cast your bread upon the waters      D．have to hold water
46．When we say it is “water under the bridge” to a friend who is upset by a mistake he/she has made, we mean “___________.”
A．forget it    B．correct it   C．worry about it D．avoid it
47．Choose a word to complete the sentence “They gave the press the___________description of what really had happened.”
A．watered-down B．waters      C．water D．watered
48．Which of the following can be used to describe Jack, who has invested a lot of money in stocks without knowing anything about the stock market?
A．Still waters run deep.
B．Too much water drowned the miller.
C．It is no safe to wading in an unknown water.
D．You can take a horse to water, but you can’t make him drink.

As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. The question everyone asks is why anyone would want to clone flies in the first place. She hopes that the insects , which are very easy to experiment with , will help to adjust the cloning process in other animals and even in humans, where the technique is being researched to aid production of therapeutic (治疗的) stem cells.

In cloning, the DNA-containing nucleus of an adult cell is injected into an egg whose own nucleus(细胞核) has been removed. At the moment, the majority of cloned mice, sheep and other animals die before birth. It is thought this is because the adult DNA is not properly ‘reprogrammed’.

Using flies, researchers might discover genes that are important for this reprogramming, and that have matches in other animals. That is because it is relatively easy in flies to knock out the function of a single gene and then attempt cloning with these cells, which will test whether that gene is important. If such genes are confirmed, then in theory cloned mammalian embryos(晶胚) might be grown in selected solutions that change the activity of those genes to improve the technique’s success rate. Although some groups have attempted to clone insects before, Lloyd says this is the first time it has been successful. The team used a slight difference on the standard cloning process: they transferred nuclei taken from embryos rather than fully-grown adult cells. They sucked several nuclei (pl)out of developing fly embryos, and injected them into a fertilized(已受精的) fly egg. From over 800 early attempts, they cloned five adult insects, the group reports in the journal Genetics.

1.The best title of this passage probably is _______.

A．The importance of clone

B．First insects are cloned

C．The disagreement in clone

D．The advantages of clone

2.The scientists cloned flies because________.

A．there are fewer and fewer flies in the world

B．flies are easy to find and cheap to use

C．they can gain some experience before cloning other animals

D．it is safe to clone flies

3.The failure of most cloned animals is due to _______.

A．the difference of other animals’ genes

B．the improper technique of clone

C．the complex of other animals

D．the improper rearrange of the adult gene

4.It can be inferred from the last paragraph that ______.

A．the clone of insects before used grown-up cells

B．the clone of insects were never experimented before

C．this time scientists cloned flies successfully and easily

D．based on this success, other animals will be cloned in large quantities.

As if there weren’t enough of them in the world already, scientists have succeeded in cloning flies. The alike fruit flies are the first insects ever cloned, says the Canadian team that created them. The question everyone asks is why anyone would want to clone flies in the first place. She hopes that the insects , which are very easy to experiment with , will help to adjust the cloning process in other animals and even in humans, where the technique is being researched to aid production of therapeutic (治疗的) stem cells.

In cloning, the DNA-containing nucleus of an adult cell is injected into an egg whose own nucleus(细胞核) has been removed. At the moment, the majority of cloned mice, sheep and other animals die before birth. It is thought this is because the adult DNA is not properly ‘reprogrammed’.

Using flies, researchers might discover genes that are important for this reprogramming, and that have matches in other animals. That is because it is relatively easy in flies to knock out the function of a single gene and then attempt cloning with these cells, which will test whether that gene is important. If such genes are confirmed, then in theory cloned mammalian embryos(晶胚) might be grown in selected solutions that change the activity of those genes to improve the technique’s success rate. Although some groups have attempted to clone insects before, Lloyd says this is the first time it has been successful. The team used a slight difference on the standard cloning process: they transferred nuclei taken from embryos rather than fully-grown adult cells. They sucked several nuclei (pl)out of developing fly embryos, and injected them into a fertilized(已受精的) fly egg. From over 800 early attempts, they cloned five adult insects, the group reports in the journal Genetics.

1.The best title of this passage probably is _______.

A．The importance of clone

B．First insects are cloned

C．The disagreement in clone

D．The advantages of clone

2.The scientists cloned flies because________.

A．there are fewer and fewer flies in the world

B．flies are easy to find and cheap to use

C．they can gain some experience before cloning other animals

D．it is safe to clone flies

3.The failure of most cloned animals is due to _______.

A．the difference of other animals’ genes

B．the improper technique of clone

C．the complex of other animals

D．the improper rearrange of the adult gene

4.It can be inferred from the last paragraph that ______.

A．the clone of insects before used grown-up cells

B．the clone of insects were never experimented before

C．this time scientists cloned flies successfully and easily

D．based on this success, other animals will be cloned in large quantities.

试题分类