单项选择题

The soldiers marched down the street, ______ their flags.

A．waved
B．waving
C．being waved
D．wave
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单项选择题
The main idea of Paragraph Three is that ______ .
A．workers now take examinations
B．the population has grown
C．there are only written exams today
D．examinations are now written and timed
单项选择题
The kind of exams where students must select answers are ______ .
A．personal
B．objective
C．spoken
D．written
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