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I don’t know when he ____. But if he ____, I’ll ring you up.
A.comes, will comeB.will come, will come
C.comes, comesD.will come, comes
D
本题考查动词时态。第一个空前的when引导宾语从句,此处用一般将来时;第二个空前的if作“如果”讲,引导条件状语从句,主句用了一般将来时,故此处用一般现在时表示将来。
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