求求求求 China _____ the WTO and become a member of it in 2001.A.joined B.joinC..has joined D will join

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求求求求 China _____ the WTO and become a member of it in 2001.A.joined B.joinC..has joined D will join

求求求求 China _____ the WTO and become a member of it in 2001.A.joined B.joinC..has joined D will join
求求求求 China _____ the WTO and become a member of it in 2001.
A.joined B.join
C..has joined D will join

求求求求 China _____ the WTO and become a member of it in 2001.A.joined B.joinC..has joined D will join
答案:A.joined
因为这是在陈述一个过去发生的事件,所以只需要用一般过去式即可.

选A
首先in 2001是过去的时间,可以排除B和D
若最后是since 2001则选C(现在完成时)
此处显然是论述过去发生的一件事情,因此是选A joined,一般过去时

c因为中国加入世贸组织是在2001年,并成为其中的一员,说明这件事是发生在过去的并已经完成了的,所以用过去完成时

选C, 这句话的时态可以从become这个单词看出来。因为一句话的谓语动词是一致的。如果选joined,后面become应改成became, 因而可以推出这里become是现在完成时的形式。所以应该选c.