The purpose of the campaign is to raise the public’s_______ of the dangers of passive smoking.

Sorry, Ted, I can’t come to your party. — That’s too bad. Maybe _____ time.

Is that your dog?—No.That is Peter’s dog. The brown one is________.

Are you going to help John with his Chinese this evening?—No，He ________ to England．He will be back next month．

.－Who taught _____ to swim?－I learned it by _____.