单选题
That was so serious a matter that I had no choice but ______ the police.
A. called in B. calling in C. call in D. to call in
A
B
C
D
【正确答案】
D
【答案解析】
分析句子结构可知have no choice but to do sth.是固定搭配,意为“不得不做,必须做”,其他三个选项均不能用于此固定结构中,因此,选项D正确。
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