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100字范文 > John thinks it won’t be long he finishes the tough work.A. whenB. afterC. sinceD. before

John thinks it won’t be long he finishes the tough work.A. whenB. afterC. sinceD. before

时间:2019-03-27 15:11:34

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John thinks it won’t be long  he finishes the tough work.A. whenB. afterC. sinceD. before

问题补充:

John thinks it won’t be long he finishes the tough work.

A. when

B. after

C. since

D. before

答案:

A. when

B. after

C. since

(答案→)D. before

解析:考查连词,since表示自从…;when当……时候;after在…之后;时间段+ before,过了多久就……;before主要引导时间状语从句,意为“先于”“…之后才”“(不多久)就…”。当主句是将来时时,从句谓语动词须用现在时;当主句是一般过去时或过去完成时时,从句常用过去时。before引导的时间状语从句不能用于否定式。所以选D

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