Question

I don’t know when my father _____ back, but I’ll let you know when he ___back. A．comes, come

I don’t know when my father _____ back, but I’ll let you know when he ___back. A．comes, comes B．will come, will come C．comes, will come D．will come, comes

Answer 1

D

考查宾语从句和时间状语从句。 我不知道爸爸什么时候回来，when引导的宾语从句，采用一般将来时；当他回来的时候我会让你知道的。when引导的时间状语从句，主句将来从句一般现在时。故答案为D。