—My sister looks very upset. What should I do?
—I think she happy if you a surprise party for her .
A. is; have
B. will be; will have
C. is; will have
D. will be; have
网友回答
A. is; have
B. will be; will have
C. is; will have
(答案→)D. will be; have
解析：本题考查的是在if引导的条件状语从句中，当主句为一般将来时时，从句要用一般现在时，代替将来时，故选D