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题目内容
（国家开放大学英语语法）
The city was difficult ________, _________ was defended by an army of 6,000 men.
A. to be taken; which
B. to take; that
C. to take; which
D. to be taken; that
A. to be taken; which
B. to take; that
C. to take; which
D. to be taken; that
参考答案
