— 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.

题型：单选题题类：常考题难易度：普通

— 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

举一反三

—I'm going to _______ the English corner. Would you like to _______ me? —I'm afraid I can't.

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