It puzzles the scientists _____ some mammals produce their young _____ others l
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It puzzles the scientists _____ some mammals produce their young _____ others lay eggs. A.that; while | B.what; while | C.that; as | D.what; as |
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答案
A |
解析
试题分析:本句中的it是形式主语 ,真正的主语是后面that引导的主语从句,that在主语从句中不充当任何成分,只起引导作用。第二空的连词while然而,表示上下文轻微的转折关系。As不能表示上下文的转折关系。句义:让一些科学家困惑的是一些哺乳动物生出下一代,而另外一些却产卵。故A正确。 |
举一反三
It was quite a long time ______ I figured out what had happened to the manager.A.after | B.before | C.when | D.since |
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Sometimes people just believe what they see, ______the reality may be different.A.as if | B.even though | C.since | D.unless |
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you meet with new words when reading English articles , you can guess the meaning first . A. Every time | B.First time | C.For the first time | D.At the time |
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______ the day went on, the weather got worse. |
A bit more effort, I think, ____ the problem could be settled. |
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