Question

I don’t know when he ____. But if he ____, I’ll ring you up.

A．comes, will come	B．will come, will come
C．comes, comes	D．will come, comes

Answer 1

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。