It’s the office! So you _____ know eating is not allowed here. —Oh, sorry.

Some people can never go above 4,000meters because their body is unable to ______ to these extreme conditions.

You just think of yourself! You kept me wailing for at least three hours． —I’ m sorry that you _____ think so．

Hurry up, ____________ you willmiss the early bus.

Studies show that the things that contribute most to a sense of happiness cannot be bought，______ a good family life，friendship and work satisfaction.