单项选择题

This is the microscope _______ which we have had so much trouble.

A．at
B．from
C．of
D．with
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单项选择题
Because of the reduction of air pollution, this city now is a good place _______
A．where to live
B．which to live
C．to be lived
D．to live
单项选择题
______ , she knows the city very well.
A．As she is blind
B．As blind she is
C．Blind as she is
D．She is as blind
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