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"Our Math teacher must be in his office now." "No, he ______ be there. I saw him in the library a minute ago."
"Our Math teacher must be in his office now." "No, he ______ be there. I saw him in the library a minute ago."
admin
2010-03-19
85
问题
"Our Math teacher must be in his office now." "No, he ______ be there. I saw him in the library a minute ago."
选项
A、can’t
B、couldn’t
C、mustn’t
D、wouldn’t
答案
A
解析
这里情态动词can表示可能性,推测数学老师现在不可能在办公室。而不是指过去的事情。另外,mustn’t则表示“不准,不允许”的意思。
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专业英语四级
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