单项选择题

Last year, these ships transported a total of 80 million tons of cargo, a 4.4 percent increase _____ the precious year.

A．by
B．over
C．with
D．to
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单项选择题
It may be worthwhile at this moment to ______ and see what progress we have made after one year's study in college.
A．look into
B．look around
C．look over
D．look back
单项选择题
He said ______ that they had been obliged to give up the scheme for lack of support.
A．miserably
B．passionately
C．graciously
D．regrettably
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