The policeman happened ______ the traffic when the accident happened.A、to direct

游客2025-07-30  1

问题 The policeman happened ______ the traffic when the accident happened.

选项 A、to direct
B、directing
C、to be directing
D、to have directed

答案 C

解析 happen后接不定式,表示正在进行时,用C的结构,答案为C。
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