题目内容
-- Look at the boy running on the ground. Is it David?
-- It _______ be him. I saw him go to the teacher’s office just now.
A. might B. could C. can’t D. mustn’t
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题目内容
-- Look at the boy running on the ground. Is it David?
-- It _______ be him. I saw him go to the teacher’s office just now.
A. might B. could C. can’t D. mustn’t