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There are many hills in the country. A train usually goes ______ tunnels.

A. across
B. through
C. along
D. up
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科目:初中英語 來源:0112 期中題 題型:單選題

There are many hills in the country. A train usually goes ______ tunnels.
[     ]
A. across
B. through
C. along
D. up

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