“Is John coming by train？” “He should but he not. He likes driving his car.”A. mustB. ca

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。