题目内容

China ______ the WTO for more than 10 years, and it has brought great changes to it.
A．has joinedB．has been inC．has become a member ofD．has joined in
B
此题重点考查延续性动词的用法，因时间状语是段时间，故谓语动词要用延续性动词。join是非延续行动词，不能和段时间状语连用。
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