单项选择题

It must have rained last night, ______ the ground is wet this morning.

A．because
B．but
C．for
D．or
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单项选择题
I ______ a glass while I ______ the dinner.
A．broke... cooked
B．broke... was cooking
C．was breaking... cooked
D．was breaking... was cooking
单项选择题
My uncle presented my child a volleyball ______.
A．to play
B．to play with
C．to play with it
D．which to play
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