This listening material, together with its CD-ROMS,______well.

Air quality in our city is becoming worse and worse.—Yes. These days’ PM2.5 readings are frightening. Wemust do something to ______air pollution.

Is it true ______ the rain stops , it will be as hot as in the summer here?

The airplane leaves at 7:00 p.mSo I have to be at the airport 5:40 pmat the latest

impressions are the most lasting.After all, you never get ________ second chance to make ________ first impression.