Will Helen come to my party tonight?I am not sure. She go to the cinema with her

问题补充：

--- Will Helen come to my party tonight?

--- I am not sure. She go to the cinema with her father.

A. shall

B. can

C. must

D. may

答案：

A. shall

B. can

C. must

(答案→)D. may

解析：情态动词辨析。A会；B可能；C一定，必须；D也许。根据I am not sure说明她非常不确定，D的语气比B还要弱。所以D正确。句意：—Helen会来参加我今晚的聚会吗？—我不确定。也许她会陪她爸爸看电影。