问题
选择题
October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war．
A．which
B．that
C．when
D．in which
答案
答案：A
考查定语从句。Which引导非限定性定语从句，在从句中作主语，选A。
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