问题补充:
—I’ve got to go now.
—Must you ?I you could stay for dinner with us.
A. think
B. thought
C. have thought
D. am thinking
答案:
A. think
(答案→)B. thought
C. have thought
D. am thinking
解析:考查动词时态。从对话语境可以看出对方要走,我想对方可能和我们一起吃饭应该发生在现在的以前,所以是现在和过去的对比,选B符合。