---- 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. didn’t have
C. don’t have
D. aren’t having
网友回答
A. won’t have
B. didn’t have
(答案→)C. don’t have
D. aren’t having
解析：英语中当主句为一般将来时态时，从句中用一般现在时态表示将来的动作，故选C。