Question

I don’t know when he_____________; when he__________, I’ll tell you.

A．come; will come

B．will come; comes

C．comes; will come

D．will come; comes

Answer 1

B

此题考查when引导的两种从句。第一空when引导宾语从句，意思是“我不知道他什么时候会来”所以用will come表将来；第二空when引导时间状语从句，符合“主将丛现”原则。所以该从句用一般现在时。