问题补充:
—Are you going to Guilin by plane?
—It’s fast but expensive, so I’m not sure. I take a train.
A. should
B. may
C. must
D. will
答案:
A. should
(答案→)B. may
C. must
D. will
解析:考查情态动词。should 应该,may 可能,must 必须,will 将要,句意:你打算乘飞机去桂林吗?很快但是比较贵,因此我不确信。我可能乘火车。所以选B。