Question

【题目】-- 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

Answer 1

【答案】C

【解析】

试题分析：句意：-看，在操场上跑步男孩。那是David吗？-肯定不是他。我看到他刚才去了老师的办公室。Can’t用于一般现在时的否定推测。所以选出正确答案C。