70. They surf three times a day if p _______, in both winter and summer.

68. I was so busy r_______ a novel that I forgot to look at the time .

69 I have known him e _______since I was a child.

67. September 10 is ________(教师)Day.

66.Monday is the _________(第二) day of the week.

65.They want to go on a long _____(旅行) to the west of China .

64.It’s a ______(遗憾)that you can’t come here.

63.He disliked his job , so he ______(放弃) it up

62. I’d like to ________(预定)four tickets, please.

61.Do you think it ________(有用)to learn English ?