问题补充:
—Mary, could you tell me if your mother our school sports meeting tomorrow?
—I think she will come to school if she free.
A. will take part in; will be
B. takes part in; is
C. will take part in; is
D. takes part in; will be
答案:
A. will take part in; will be
B. takes part in; is
(答案→)C. will take part in; is
D. takes part in; will be
解析:考查if引导的宾语从句及条件状语从句的用法。问句是由if引导的宾语从句,时间状语为 tomorrow,故用一般将来时;答语是由if引导的条件状语从句,主句用将来时,从句用一般现在时,故选C。