The UN _____ the documents to save the environment in 2007 and they work well all over the world now.
A. drew up B. built up C. gave up
— What do you think of the Beijing Roast Duck?
— It’s delicious. Nothing is _____ .
A. good B. better C. best
— Tell the children _____ unhealthy food.
— OK, I will. I know it’s bad for their health.
A. not to eat B. to eat C. eat
— _______is your home from our school?
—It’s about ten minutes’ walk.
A. How long B. How soon C. How far
— Long time no see!
— Yes, we haven’t seen each other _____ May 4, 2009.
A. since B. in C. on
— Must I finish my homework now?
— No, you _____.
A. mustn’t B. needn’t C. can’t
