—He must be in the reading-room now. We will find him there.
---No, he .Tom said he was ill at home .
A. must not
B. can’t
C. may not
D. should not
网友回答
A. must not
(答案→)B. can’t
C. may not
D. should not
解析：四个选项分别表示不准、不能、不可以和不应该，根据题意选B，他现在肯定在教室读书。我们会在那儿找到他。——不，他不可能。汤姆说他在家养病。