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The field research will take Joan and Paul about five months; it will be a long

time ____ we meet them again.

   A. after      B. before      C. since      D. when

B


解析:

譯文：實際教學/現(xiàn)場調查研究將花Joan 和 Paul 大約五個月時間；將過很長時間我們才能在見面�？键c：一般將來時間的常用句式。①肯定句式It will be some time before sth happens=It will take (sb) some time before sth happens.將過多長時間或將用多久某事才會發(fā)生。②變成否定句式It won’t be long before sth happens=It won’t take long before sth happens.不久/沒過多久/沒花多長時間某事就發(fā)生了。③聯(lián)想到過去將來句式It wasn’t long before sth happened=It didn’t take long before sth happened.沒用多長時間某事就發(fā)生了。④變化為肯定式It was/ took some time before sth happened.過了多久某事才發(fā)生。e.g.例如：①It will be another two weeks before the school sports meeting takes place.再過兩周學校運動會才會舉行=It will take (us) another two weeks before it takes place. →②否定句It will not be long before it takes place.=It won’t take long before it is held. 學校運動會不久就舉辦了。

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