问题补充:
“Why didn’t she come to the meeting yesterday?” “I’m not so sure. She ill.”
A. should be
B. should have been
C. must be
D. might have been
答案:
A. should be
B. should have been
C. must be
(答案→)D. might have been
解析:从时间上看,由于是昨天没来开会,所以推测他生病也应指昨天,故排除A和C。从语境上看,既然上文说 I’m not so sure,那么说明说话者对自己的推测没有很大把握,故选D。