单项选择题

She's upstairs ______ letters.

A．writes
B．is writing
C．write
D．writing
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单项选择题
Mary ______ a dress when she cut her finger.
A．made
B．is making
C．was making
D．makes
单项选择题
Does ______ matter if he can't finish tile job on time
A．this
B．that
C．he
D．it
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