问题
选择题
—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
答案
答案：D
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