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科目: 来源:不详 题型:单选题

Don’t promise anything ______ you are one hundred percent sure.
A.whetherB.afterC.howD.unless

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科目: 来源:不详 题型:单选题

---Where’s that report?
---I brought it to you ________ you were in Mr. Black’s office yesterday.
A.if B.whenC.becauseD.before

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科目: 来源:不详 题型:单选题

It is difficult for us to learn a lesson in life ____we’ve actually had that lesson.
A.untilB.afterC.sinceD.when

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科目: 来源:不详 题型:单选题

He was told that it would be at least three more monthshe could recover and return to work.
A.whenB.beforeC.sinceD.that

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科目: 来源:不详 题型:单选题

he field research will take Joan and Paul about five months; it will be a long time _______ we meet them again.
A.afterB.beforeC.sinceD.when

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科目: 来源:不详 题型:单选题

Many of them turned a deaf ear to his advice, _______ they knew it to be valuable.
A.as ifB.now that C.even thoughD.so that

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科目: 来源:不详 题型:单选题

_______,his idea was accepted by all the people at the meeting.
A.Strange as might it sound
B.As it might sound strange
C.As strange it might sound
D.Strange as it might sound

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科目: 来源:不详 题型:单选题

I won’t call you, ________ something unexpected happens.
A.becauseB.whetherC.unlessD.while

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科目: 来源:不详 题型:单选题

You will be successful in the interviewyou have confidence.
A.beforeB.onceC.untilD.though

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科目: 来源:不详 题型:单选题

Most birds find it safe to sleep in the trees, but ________they have eggs or young chicks, they don’t use a nest.
A.whyB.howC.unlessD.where

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