单项选择题

I don't know ______ yesterday.

A．why didn't he go to school
B．why he didn't go to school
C．when he didn't go to school
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单项选择题
Mother often ______ for me.
A．makes a bed
B．makes the bed
C．makes bed
单项选择题
The businessman lived in ______.
A．a village
B．a town
C．a city
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