- Air quality in our city is becoming worse and worse.
- Yes. These days' PM2.5 readings are frightening. We must do something to _______ air pollution.
A.reduce | B.remove | C.collect | D.gather |
- Air quality in our city is becoming worse and worse.
- Yes. These days' PM2.5 readings are frightening. We must do something to _______ air pollution.
A.reduce | B.remove | C.collect | D.gather |
试题篮
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