It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.
| A.that; while | B.what; while | C.that; as | D.what; as |
科目:高中英语 来源: 题型:单选题
We shouldn’t drink _______ we drive and we mustn’t drive if we’ve drunk.
| A.unless | B.before | C.until | D.while |
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科目:高中英语 来源: 题型:单选题
How can you expect to learn anything ______ you spend all your time playing computer games?
| A.unless | B.until | C.though | D.when |
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科目:高中英语 来源: 题型:单选题
It just isn’t fair that____I was working as a waiter last month, my friends were lying on the beach.
| A.while | B.whenever | C.though | D.for |
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科目:高中英语 来源: 题型:单选题
——Did you stay up very late last night?
——No,It was not 10 o’clock yet ____I went to bed.
| A.when | B.until | C.that | D.while |
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科目:高中英语 来源: 题型:单选题
______ the day went on, the weather got worse.
| A.With | B.Since | C.While | D.As |
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科目:高中英语 来源: 题型:单选题
Provide your doctor with a detailed medical history ____he can give you the accurate treatment
| A.even if | B.in case | C.so that | D.as though |
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科目:高中英语 来源: 题型:单选题
Of all the books on the desk, _____is of any use for our study.
| A.no one | B.nothing | C.none | D.neither |
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科目:高中英语 来源: 题型:单选题
It may be 5 or 10 years __________ it is possible for people to find a space station on the moon.
| A.since | B.before | C.after | D.when |
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