It___five years ___the whole project was completed.A.was;until B._英语解答

It___five years ___the whole project was completed.
A.was;until B.was;since C.took;until D.took;before
为什么答案是D?

人气：471 ℃　时间：2020-02-20 15:41:04

解答

选择D
It takes+时间+before是一个固定句型,在.之前一共花费了.时间
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