1、China ________ the WTO and ________ a new member of it in 2001.

问题描述:

1、China ________ the WTO and ________ a new member of it in 2001.
A.joined…became
B.joins….becomes
C.will join…become

A.joined…became 因为有具体的过去的时间 in 2001 所以用过去时