66. (2018新疆建设兵团)Nobody knows if he ________. If he ________ here, I'll call you at once.

66. (2018新疆建设兵团)Nobody knows if he ________. If he ________ here, I'll call you at once.
A. will come; will arrive  B. will come; arrives
C. comes; will arrive  D. comes; arrives
66. B【解析】考查一般将来时和主将从现的用法。句意:没人知道他是否会来。如果他到了这里,我会立刻给你打电话。第一句if(是否)引导的宾语从句,表示将来的动作,用一般将来时;第二句if(如果)引导的条件句,从句用一般现在时表将来。故选B。
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