Question

--I want to know when Mr. Brown will arrive.
--When he            , I will tell you.
A. will arrive              B. arrived                 C. arrives

Answer 1

C

考查状语从句的用法。用when引导的时间状语从句，用一般现在时表示将来；“主将从现”，主语是单三，动词用单三形式arrives。