单项选择题

Not until the 1980's ______ in Beijing start to find ways to preserve historic buildings from destruction.

A．some concerned citizens
B．some concerning citizens
C．did some concerning citizens
D．did some concerned citizens
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单项选择题
Please ______ if you ever come to Sydney.
A．look at me
B．look me up
C．look me out
D．look to me
单项选择题
Brooding and hopelessness are the ______ of Indians in the prairie reservations most of the time.
A．occupations
B．promises
C．frustrations
D．transactions
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