prices have been going up, so thatthe richer you get, the less rich you are than ________ you think you ought tobe.

Why didn’t you tell him about the meeting— He rushed out of the room _____ I could say a word.

It’s hard to imagine_____it would be like living on Mars.

Miss Li teaches ______ English five times a week.

service ads, also PSAs, often _________ for free, _________ to educate people about health, safety or any other problem that affects public welfare