单项选择题

It's nearly seven o'clock. Jack ______ be back home at this moment.

A． must
B． could
C． can
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单项选择题
This morning I went to work in such a hurry that ______ the key to my office at home.
A． forgot
B． missed
C． left
单项选择题
If you ______ him tomorrow, please ask him if he ______ to work on the farm with us.
A． see; goes
B． will see; will go
C． see; will go
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