There is no way of knowing why one man makes an important discovery ______ another man, also intelligent, fails.
| A.since | B.if | C.as | D.while |
科目:高中英语 来源: 题型:单选题
Milk will turn sour soon on hot days ______ it is stored in the refrigerator.
| A.since | B.until |
| C.because | D.unless |
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科目:高中英语 来源: 题型:单选题
Why do you insist on buying a car ______ you have such good public transportation here?
| A.because | B.unless | C.when | D.though |
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科目:高中英语 来源: 题型:单选题
____ I'm mistaken, I've seen that tall man at a party before.
| A.If | B.As | C.Unless | D.When |
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科目:高中英语 来源: 题型:单选题
_______ you’ve got a chance, you might as well make full use of it.
| A.Now that | B.After | C.Although | D.As soon as |
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科目:高中英语 来源: 题型:单选题
It is by no means clear ________ the president can do something to end the strike.
| A.whether | B.which |
| C.that | D.what |
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科目:高中英语 来源: 题型:单选题
You cannot take back your words _________ they are out of your mouth.
| A.before | B.whether | C.once | D.while |
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科目:高中英语 来源: 题型:单选题
I have a tight budget for the trip, so I'm not going to fly _ the airlines lower ticket prices.
| A.once | B.if | C.after | D.unless |
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科目:高中英语 来源: 题型:单选题
Sinking in the cheers of people, David walked off the stage, tears dropping he could stop them.
| A.after | B.when | C.until | D.before |
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