单项选择题

It is difficult to discern the sample that is on the slide unless the microscope is adjusted properly.

A．overlook
B．disclaim
C．discard
D．detect
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单项选择题
She got used to his manner of speaking soon.
A．had been used To
B．would be used to
C．became accustomed to
D．used to
单项选择题
In certain types of quartz, bands of color form an irregular pattern.
A．shades
B．cautioned
C．motivated
D．requested
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