“Why didn’t she come to the meeting yesterday?” “I’m not so sure. She ill.”A. should beB

“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

A. should beB. should have beenC. 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。

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