问题
选择题
China，which has the largest population of the world，joined the WTO last week，________15 years
of talks.[ ]
A．to end
B．ended
C．ending
D．ends
答案
答案：C
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China，which has the largest population of the world，joined the WTO last week，________15 years
of talks.[ ]
A．to end
B．ended
C．ending
D．ends
答案：C