单项选择题

The road is wet. It ______ last night.

A．should have rained
B．must have rained
C．could have rained
D．must rain
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单项选择题
He does not know ______ to deal with the matter and is very worried.
A．what
B．that
C．how
D．as
单项选择题
Yesterday, the couple went downtown and bought ______ .
A．two furnitures
B．two pieces of furnitures
C．the furnitres
D．two pieces of furniture
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