[题目] cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.A. As B. IfC. Unless D. While 题目和参考答案——青夏教育精英家教网—

题目内容

【题目】 cloning human embryos is not legal in many countries, some scientists are already pushing ahead with research in order to produce a cloned human baby.

A. As B. If

C. Unless D. While

【答案】D

【解析】考查连词。A. As由于；B. If如果；C. Unless 除非； D. While尽管。句意：虽然克隆人类胚胎是违法的，但一些科学家已经在努力推进研究为了制造克隆的人类婴儿。选A。

练习册系列答案

A. did he go; had started B. he went; started

C. had he gone; started D. he had gone; had started

【题目】After retirement, Mr. Smith _____ painting, which he had always loved but had no time for.

A. turned up B. held up C. made up D. took up

【题目】He started to study hard and decided to________his whole life to the science.

A. ignore B. devote C. prefer D. lead

【题目】 I would rather I________ with her about it, but I didn’t control my feelings at that time.

A. didn’t argue B. hadn’t argued

C. wouldn’t argue D. not have argued

【题目】—What should I wear for the party, darling?

— We’re already late!

A. Come on! B. Cheer up!

C. It’s a long story. D. Don’t mention it.

【题目】The hurricane ruined my vacation early this morning, otherwise I _____in Hawaii sunbathing on the beach at the moment.

A. should have been B. might have been

C. would be D. am

【题目】As a child, I liked listening to stories, so now it is __________ a great story that my warmest memories from childhood come from.

A. reading B. being read

C. to read D. to be read

【题目】If you miss this chance, it might be years____you get another one.

A. as B. before

C. since D. after

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