---He___ be in the classroom, I think.
---No, he ___ be in the classroom. I saw him go home a minute ago.
A. can; may not B. must; may not
C. may; can't D. may; mustn't
---He___ be in the classroom, I think.
---No, he ___ be in the classroom. I saw him go home a minute ago.
A. can; may not B. must; may not
C. may; can't D. may; mustn't
C