单项选择题

John's score on the test is the highest in the Class; he ______ last night.

A．must study
B．should have studied
C．must have studied
D．is sure to study
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单项选择题
Martin from time to time offered remarks ______ the effect that he was a wonderful scientist and that he had a good command of psychology.
A．to
B．in
C．with
D．for
单项选择题
Of the thousands of known volcanoes in the world, the ______ majority are inactive.
A．tremendous
B．demanding
C．intensive
D．overwhelming
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