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It’s very convenient ______ us to buy train tickets now because we can buy them either from the station or on the Internet.
#48015
A
to
B
of
C
by
D
for
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 I’m going to Beijing ______the 12th.
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in
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on
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A tsunami(海啸) happened in some southern Asian countries________ December, 2004.
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is; with
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#48160
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with
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to
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