题目内容
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
C
解析:
The city was difficult to take = It was difficult to take the city. 只要这两种句型能够互换,不定式就得用主动的形式。
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