以下是精品学习网小编精心为大家分享的2014年初二英语暑假练习作业欢迎大家参考学习。

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

In the past, scientists have produced exact genetic copies of sheep and a few other animals. They  36  these clones from a single cell of an adult animal.

Recently, a private group of scientists has announced  37  to make an exact copy of a human being. Doctor Zavos, an American member of the team, says he and  38  will soon begin to clone humans and they hope to produce the world’s first cloned  39  within the next two years.

Doctor Zavos says the new  40  group plans to offer human cloning to women unable to become  41  and produce children. The  42  would be similar to that used to clone animals. It would  43  clearing genetic material from a woman’s egg. Doctors then would  44  genetic material from the woman’s husband into the egg  45  putting it in the women’s uterus(子宫).

Doctor Zavos says his  46  plans to do its work in a country near the Mediterranean Sea, but he did not  47  the country. He says an Italian reproductive expert, Severino Antinori, is  48  the team. Doctor Antinori has made  49  efforts to help many older women become pregnant. He is known for  50  pregnancies in women as old as sixty.

Many medical experts and other groups  51  the idea of cloning humans. Several doctors criticized the  52  by Doctor Zavos. They say doctors do not know if cloning humans is  53  or safe. They say it would be irresponsible to  54  to clone a human being. That is because the   55  of success are too small and the risks are too great.

36. A. bought        B. created       C. discovered       D. found

37. A. plans         B. results        C. successes          D. agreements

38. A. another       B. others         C. the other           D. the others

39. A. baby         B. animal        C. bird               D. plant

40. A. Italian          B. national       C. American          D. international

41. A. successful     B. pregnant        C. born              D. fertile

42. A. imagination    B. story           C. technology         D. symbol

43. A. start           B. involve         C. make              D. borrow

44. A. translate      B. take            C. place             D. make

45. A. before        B. while           C. after            D. on

46. A. country      B. university       C. group             D. company