—Will Mr Brown come to visit the company ?—We don’t know if he If he we’ll tell you．A. c

问题补充：

—Will Mr Brown come to visit the company ?

—We don’t know if he ．If he ，we’ll tell you．

A. comes，comes

B. will come，comes

C. comes，will come

D. will come，will come

答案：

A. comes，comes

(答案→)B. will come，comes

C. comes，will come

D. will come，will come

解析： 前文if是是否的意思,后文是如果的意思,引导条件状语从句.根据题意前面叙述的是将来的事情,用将来时态,后文主句是将来时态,从句用一般现在时态,故选D.