问题补充：
-Tommy, do you know if Frank to the theatre with us this Sunday if it?
-Sorry, I have no idea.
A. will go, is going to be fine
B. goes, is fine
C. will go, is fine
D. goes, will be fine
答案：
A. will go, is going to be fine
B. goes, is fine
(答案→)C. will go, is fine
D. goes, will be fine
解析：句意：--托尼，你知道如果明天是好天气，富兰克林是否与我们一起去剧院。--对不起，我并不知道。分析第一句为if引导的宾语从句，从句从用本来的时态，去剧院的动作为将来要进行的，要用将来时；第二个句子为if引导的条件状语从句，体现主将从现的原理，主是将来时，从句要用一般现在时。故选C
