Unit 2 cloning Reading课时作业

[课 文 预 读]

Ⅰ. 课文理解

1．Dolly the sheep ________.

A．looked exactly like the sheep that provides the egg

B．was the exact copy of the sheep that provides the nucleus

C．looked like the sheep that gave birth to it

D．had the characteristics of all three sheep

2．It can be inferred from the passage that a cloned animal ________.

A．usually lives as long as the original one

B．usually lives longer than the original one

C．usually lives shorter than the original one

D．is usually as healthy as the original one

3．Which of the following is NOT an advantage of cloning?

A．Cloning can be used for medical purposes.

B．Large quantities of food can be produced by cloning.

C．Cloning can help keep animals from becoming extinct.

D．Famous persons who have passed away can be cloned.

4．Which of the following is NOT a problem or danger of cloning according to the passage?

A．Cloned Bin Laden would do harm to the world.

B．Animal clones may develop the illness of older animals and may die younger than the donor animals.

C．There are moral objections to cloning human beings.

D．Too much cloning may lead to the destruction of the balance of nature.

5．From the passage，we can see ________.

A．Dolly's original sheep lived 12 years

B．Dolly's baby was also a cloned one

C．newspapers did not disclose cloning sheep

D．officials became nervous about cloning