12.Do you know if we will go for a picnic this Saturday?I think we will if we __any classes.

问题描述:

12.Do you know if we will go for a picnic this Saturday?I think we will if we __any classes.
A.won't have B.did't have C.don't have D.aren't having

正确:C
if表示“如果”时,常套用“主将从现”,即主句使用一般将来时,从句使用一般现在时,第二句句中的if表示“如果”的含义,即从句使用一般现在时.第一句中的if表示“是否”,从句需根据实际选用时态.