My father went to Shanghai early this morning and he will be back in two days.He （）be at home nowAmay not BcannotCmust notDwill not
问题描述：
My father went to Shanghai early this morning and he will be back in two days.He （）be at home now
Amay not Bcannot
Cmust notDwill not
答
B
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答
B
may not 表示可能不
can not 表示否定的猜测--不可能（在家）
must not 表示禁止
will not 将来不--与后面的now矛盾
因此选B
答
A
答
对现在的状态猜测的否定是can not 选B
答
B
表否定推测要用can't
may 和 must 指用于肯定推测