问题补充：
If you listen to me, you have some candies, Tommy.
A. are able to
B. shall
C. must
D. need
答案：
A. are able to
B. shall
(答案→)C. must
D. need
解析：情态动词十have done，可表示猜测,这种句子结构的反意疑问句应该与情态动词无关，而与后面的完成结构一致，如果有过去的时间状语，则用一般过去时反意疑问。如：You must have lived there last year, didn’t you?
