I don’t know if she. If she please let me know.A. comes; comesB. will come; comesC. come

问题补充：

I don’t know if she. If she , please let me know.

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：句意:我不知道是否她能否来，如果她来了，请让我知道。第一个if引导的是宾语从句，因为她将要来，所以可以用将来时；第二句的if引导的是条件状语从句，不能用将来时，而用一般现在时来代替，根据句意故选B。