单项选择题

______ work has been done to improve people's living standard.

A．Many
B．A great many
C．A large number of
D．A great deal of
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单项选择题
What's in your hand It is a ______ bill.
A．two-thousand dollar
B．two thousand dollars
C．two-thousand-dollar
D．two-thousand-dollars
单项选择题
I didn't know what to do but then an idea suddenly ______ me.
A．happened to
B．entered
C．occurred to
D．took place
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