33. You _____(have) better _____ (not eat) the bad food.

32. _____ (study) hard at your lessons and (not talk) in class.

31. They _____ (see) a boy _____ (fall) into the river while they ____(pass) it yesterday.

30. When I was five , I _ __ _ (get) to know the earth ____ (move) around the sun.

29. When Mother came ,the little girl ____ (play) with a cat.

28. When I ____ (walk) along the river ,I met my friend, Tom.

27. I watched TV, so I ____ (forget) _____ (do) my homework.

26. Peter won´t have a rest until he ____ (finish) his work.

25. Please keep everything ____ (clean).

24. There _____ (be) a telephone call for you just now.