38. Sometimes he _________(help)his mother with the housework.

37. Don't make a noise. Grandma _________(sleep).

36. What _______ you _______(do)these days?

35. Why _______ they _______(go)to the library after school yesterday? Because they _________(want)to borrow some books.

34. Where _________(be)your parents last year? They ________(be)in Xi'an.

33. ________you ________(be)there tomorrow? No，I ________.

32. If I am free this evening，I ________(help)you with your maths.　

31. The teacher _________(not teach)us a Chinese song，he ________(teach)us an English song two days ago.

30. Listen! Who _________(sing)in the next room?

29. If it __________ (rain) this morning, we won't go shopping.