题目

—My sister looks very upset. What should I do?—I think she      happy if you ____a surprise party for her .A．is; haveB．will be; will haveC．is; will haveD．will be; have 答案：D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

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