--- Would you mind my opening the window? ---
I don’t think one country can solve the problem of pollution alone, _______?
--- Have you finished all your homework?--- Of course. I ______ it before I went out to play football.
Shangri-la, a place of mystery and beauty, is indeed a heavenly world ______ people live in.
---You are confident about passing the coming test, aren’t you?---______. I’m well prepared and feel I will make it.
.Very loud noises ______ make people ill. So we ______ make great noise