You can go to ask our teacher for help.He______be in the office.I saw him there just now.A.can B.must C can't D.mustn't

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You can go to ask our teacher for help.He______be in the office.I saw him there just now.A.can B.must C can't D.mustn't
You can go to ask our teacher for help.He______be in the office.I saw him there just now.
A.can B.must C can't D.mustn't

You can go to ask our teacher for help.He______be in the office.I saw him there just now.A.can B.must C can't D.mustn't
B
must be一定是

选C
can may must 情态动词
may be猜测
must be 肯定性的猜测
can't be 否定性的猜测