—How about this CD?—Well,I don’t think it is________.
— We can use QQ to talk with each other online.— Really? Could you please show me _______ it?
---Where would you like to go? ---I’d like to go ________.
I don’t like people ______ talk much but do little.
The earth will become worse and worse ________ we do something to stop her from being polluted.
— Can you come and play football with me? —______. I have a lot of homework to do.