问题描述：
选择填空（最好有解释）
1.The computer room is ____ the second floor.
A.on B.at C.in
2.Do they like ________?
A.listen to music B.listening to music C.listens to music
1.The computer room is ____ the second floor.
A.on B.at C.in
2.Do they like ________?
A.listen to music B.listening to music C.listens to music
问题解答：
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