问题
选择题
17..In the United States, bus travel doesn't cost much as train travel, ?
18.
A．don't they
B．does it
C．do they
D．doesn't it
答案
答案：B
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17..In the United States, bus travel doesn't cost much as train travel, ?
18.
A．don't they
B．does it
C．do they
D．doesn't it
答案：B