—Is Mr Smith swimming in the pool, Harry? —It _____ be him. I saw him go to the library just now. [

题目简介

—Is Mr Smith swimming in the pool, Harry? —It _____ be him. I saw him go to the library just now. [

题目详情

—Is Mr Smith swimming in the pool, Harry?
—It _____ be him. I saw him go to the library just now. 
[     ]
A. may not
B. can't
C. needn't
D. mustn't
题型:单选题难度:中档来源:专项题

答案

B

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