55. Please ask him ______ (go) to school tomorrow.

54. How many ______ (bus) are there?

53. It's very kind of you ______ (help) us.

52. It's time for us ______ (clean) room.

51. I can see two ________ (watch) on the desk.

50. Let’s _________(fly) a kite in the park(公园).

49. -------Would you like _________(go) to the zoo?

------Yes, I want to see animals.

48.　 -------Why not _________(take) it? It looks very nice.

----- All right.

47. Would you like something _______ (drink)?

46. --------Excuse me, is this pet dog _________ (she)?　　 ------No, it isn’t.