问题补充:
-- you come to my birthday party tomorrow, Robert?
--I’m afraid not. I have to study for my exam.
A. Must
B. Should
C. Can
D. Need
答案:
A. Must
B. Should
(答案→)C. Can
D. Need
解析:考查情态动词,Must 必须,Should 应该,Can 能,会,Need 需要,句意:罗伯特,你明天能来参加我的生日聚会吗?恐怕不行,为了考试我要学习。所以选C。