11.  Now machines are widely used all over the world.

12.  They are doing good business.

13.  They are expecting a bumber harvest.

14.  They are having a good time.

15.  We are holding the school sports meeting.

16.  there are so many popular song which are liked by young people now, I like the songs too ,but I don't think those will be popular forever, this song" happy birthday to you is my favourite song, perhaps you will be asked me: "it's too easy and simple, why do you like it ?"

17.  When you are standing .

18.  You are shaking your thinner arms and shaking down the fruits on the trees.

19.  When fierce wind blows, when tide comes at you--my dear teacher, you are still standing.

20.  your black hair is turning white and the wrinkles on your for head are getting deep -but you say that it is the last season in your life.