---Look at the boy running on the playground. Is it David?-It be him. I saw him go to

发布时间：2020-08-21 06:49:18

---Look at the boy running on the playground. Is it David?
---It      be him. I saw him go to the teachers’ office just now.
A. mustn’t
B. can’t
C. couldn’t
D. must

网友回答

A. mustn’t
(答案→)B. can’t
C. couldn’t
D. must
解析：根据后文的内容，可知为否定的选择为B
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