问题
选择题
It's very convenient ______ us to buy train tickets now because we can buy them either from
the station or on the internet.[ ]
A. to
B. of
C. by
D. for
答案
答案：D
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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.[ ]
A. to
B. of
C. by
D. for
答案：D