单项选择题

The microscope enables scientists to distinguish an incredible number and variety of bacteria.

A．a selected
B．a verifiable
C．an unbelievable
D．an unavoidable
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单项选择题
The team published their report after three-month investigation which triggered off a parliamentary debate.
A．shot
B．delayed
C．started
D．concluded
单项选择题
He was given a present in acknowledgement of his work for the business.
A．honor
B．realization
C．encouragement
D．recognition
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