问题

I wonder why Susan looks worried today. —I’m not sure, but she _____a small accident driving here.

A:could have
B:might have
C:might have had
D:must have had

正确答案是：

同类题型

China’s reform and opening has been going on for ________ is like about 30 years now and it’s really quite remarkable

There _______ a football match next week.

.-Could I use your bike? -Yes,surely you__________.

_____inthequeueforhalfanhour,Tomsuddenlyrealizedthathehadlefthiswalletathome. [ ]

____________ —I’d like to buy a present for my father.