50. His sudden _______(die) made us very sad.

49. My grandfather has been __________(die) for many years.

48. You shouldn’t ride your bike so fast at the 　　　　　. (cross)

47. It’s difficult for us to swim __________(cross) the river in twenty minutes.

46. “How many times have you been to Window of the World?”　 “______(two).”

45. It’s a _________(please) to have a picnic with all the family members.

44. The trip was so __________(please) that we would remember it for ever.

43. The teacher was not ___________(please) with us.

42. Lily’s father believed that her daughter had made a good _________(decide).

41. Let’s have a __________discuss about the trip.(far)