— Susan would you like to go hiking with us this afternoon?— Id love to but Istudy for

问题补充：

— Susan, would you like to go hiking with us this afternoon?

— Id love to, but Istudy for a test.

A. may B. have toC. can

答案：

解析：情态动词的考查。May意为“可以”；can意为“能够”，have to意为“不得不”，根据句意可知“我不得不为考试而学习”。