单项选择题

The machine was making __________.

A．lot of noise
B．lot of noises
C．a lot of noise
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单项选择题
The knife is made __________ metal and wood.
A．to
B．of
C．from
单项选择题
I __________ my English book in reading-room. Please go and get it for me.
A．forgot
B．lost
C．left
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