题目内容
The air in this area has a strange smell, but we it.
A. polluted; used to B. polluted; are used to C. polluting;used to D. polluting; used to
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题目内容
The air in this area has a strange smell, but we it.
A. polluted; used to B. polluted; are used to C. polluting;used to D. polluting; used to