— Oh, you sounded just like a native.— ______. I still have trouble expressing myself.
The world’s elderly population will exceed(超过) ____ of children by 2060, when each group ____ to account for about one fifth of the population.
The U. S.declares it has the best medical technology in the world,but quite a lot of Americans have no ____to health care service.
We’d better _____ some sports because sports can give us a perfect build and protect us from getting illness easily.
Making mistakes is a part of life. ________ matters is _________ you do afterwards.
________ the past, leaving the sadness behind, _____ you’ll see the door of a new bright world open before you.