单项选择题


A．alarm
B．colonization
C．conversion
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单项选择题
The moon is __________ kilometres away.
A．three hundreds and eighty thousands
B．three hundreds and eighty thousand
C．three hundred and eighty thousand
单项选择题
I know something about Xi’an. I __________ there many times.
A．have gone
B．went
C．have been
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