阅读下列各小题，根据括号内的汉语提示，用句末括号内的英语单词完成句子

71.You may                   (指望) he will come to help you.(rely)

72.He was busy writing a letter            (而不是)doing his homework.(rather)

73.—He was late again this morning.

—He                               (本应该出发) earlier. (set)

74.Can’t you see that your design            (正在被讨论)? Have some patience, please.(discuss)

75.E-mail, as well as letters,                (正起着重要的作用) in daily communication. (play)

76.I would rather you                       (求助于他) yesterday, than now. (turn)

77. He gave the long speech without                    (看他的笔记).(refer)

78.                (无论哪一本词典)you want to buy, I’ll pay for it. (whichever)

79. The school                   (缺少) for experienced teachers now. (badly)

80. Justin kicked the ball into his own goal.                   (由于) his stupidity that we won the game. (thanks)