单项选择题

The last half of the nineteenth century ______ the steady improvement in the means of travel.

A．has witnessed
B．was witnessed
C．witnessed
D．is witnessed
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单项选择题
The new appointment of our president ______ from the very beginning of next semester.
A．takes effect
B．takes part
C．takes place
D．takes turns
单项选择题
It was ______ that this matter be considered at the next meeting.
A．proposed
B．opposed
C．supposed
D．composed
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