根据括号里的中文提示， 完成句子；每空填一个单词。

71. When she saw the poor dead cat, she ______ _______ _______.(禁不住哭了)

72.Though pandas eat vegetables sometimes, they mainly ______ ______ bamboo.(以…… 为主食)

73. The earthquake will ______ ______ a lot of diseases and homeless people.(导致)

74. It is ______ ______ _______ _______ arguing with him; he is always not reasonable.(浪费时间)

75. Don’t ______ ______ _______ your classmates. It is impolite.(取笑)

76. He didn’t steal anything. ______ ______ he is honest all the time.(事实上)

77. After eight years, the machine is still _____ ______ and in good condition.(在使用中)

78. Once you make a promise, you should ______ it ______.(实施)

79. We had reached the top of the mountain ______ _____ _____ sun rose.(到…… 时候)

80. You must keep calm when fires ______ ______ . (发生)

35. --- Why did Sarah cry just now?

　 --- She wanted a toy, _____ I can’t afford.

A. it　　　　 B. one　　　 　　C. that　　　　 D. what

34. You’d better keep ______ when I take photos for you.

A. silent　　　 B. calm　　　　 C. still　　 　　D. mild

33. I can’t afford _______ car.

A. that expensive　　　　　　 B. a such expensive　

C. a so expensive　　　　　　 D. that expensive a