单项选择题

A large ______ of money is spent on tobacco every year.

A．account
B．amount
C．number
D．quality
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单项选择题
Mrs. Miller is supposed ______ for Pairs last week.
A．to have left
B．to be leaving
C．to leave
D．to have been left
单项选择题
I ______ bread and eggs every morning.
A．am used to eat
B．used to eating
C．am used to eating
D．use to eat
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