单项选择题

I was trying to get into the ______ bus when I heard a voice from behind.

A．crowd
B．crowding
C．crowds
D．crowded
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单项选择题
The word controversy in Paragraph 5 is closest in meaning to ______.
A．choice
B．control
C．argument
D．statement
单项选择题
According to Ban the Bottle, drinking bottled water costs ______ dollars per year.
A．8
B．20
C．49
D．1400
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