After several days’ investigation, the police found out one clue that voices wer

游客2023-11-11  26

问题 After several days’ investigation, the police found out one clue that voices were heard______for help from some very distant place that night.

选项 A、to call
B、called
C、calling
D、call

答案 C

解析 非谓语动词题。该题考查的是非谓语动词作定语的情况。该句同位语从句的主语是voices,谓语是were heard,很显然call在句中为非谓语动词,排除D;call的逻辑主语是voices,二者是主动关系,排除B。此外,由于事情已经过去,不能用来表“将来”,故排除A。故C正确。
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