问题补充:
“Is John coming by train?” “He should, but he not. He likes driving his car.”
A. must
B. can
C. need
D. may
答案:
A. must
B. can
C. need
(答案→)D. may
解析:考查情态动词。Must必须,一定;can能,能够,表客观能力;need需要;may可能,可以,语气比can弱,表推测。句意:约翰乘火车来吗?他应该是,但是他可能不。他喜欢开车。表示推测语气,故选D。