—When and visit our exhibition next month?— When I will let you know.A. will he come; he

问题补充：

—When and visit our exhibition next month?

— When, I will let you know.

A. will he come; he will come

B. will he come; he comes

C. does he come; he will come

D. does he come; he comes

答案：

A. will he come; he will come

(答案→)B. will he come; he comes

C. does he come; he will come

D. does he come; he comes

解析：第一句中的时间状语next month确定了这句的一般将来时的时态，然而第二句是由when引导的时间状语从句，在时间状语从句中只能用一般现在时表示一般将来时。