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By the time he ________ at the station,it ________ dark .

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By the time he ________ at the station,it ________ dark .
A.arrived; got
B.had arrived; had got
C.had arrived; got
D.arrived; was getting
By the time he ________ at the station,it ________ dark .
答案D
by the time引导状语从句时,从句用一般现在时,主句根据意思可用完成时表示已经发生的动作,一般过去时表过去的状态,进行时表正在进行的动作等.本句表示“天正暗下来”,get表动作.