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He ______ be in the classroom because he was seen playing football on the play-
He ______ be in the classroom because he was seen playing football on the play-
游客
2025-07-30
20
管理
问题
He ______ be in the classroom because he was seen playing football on the play- ground.
选项
A、mustn’t
B、can’t
C、may not
D、isn’t able to
答案
B
解析
“must +be”表示对目前状态的猜测,但只能用于肯定句。否定句和疑问句要用can。答案为B。
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