Do you know when Mr. Brown ? When he please let me know.A. will come; will come B. come

问题补充：

Do you know when Mr. Brown ? When he , please let me know.

A. will come; will come

B. comes; is coming

C. is coming; comes

D. comes; will come

答案：

A. will come; will come

B. comes; is coming

(答案→)C. is coming; comes

D. comes; will come

解析：考查时态：句意：你知道布朗先生什么时候来？当他来的时候，请让我知道。第一空when是什么时候,填一般将来时,第二空when是当…时候，引导时间状语从句，不能用一般将来时，用一般现在时代替一般将来时。选C。