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
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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
单项选择题
Lucy ______ English for six years by the end of last year.
A．had learned
B．learned
C．has learned
D．could have learned
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