81.　 We are ___________(吃惊) at his accent .

80.　 As we all know, 75 percent of the earth ' s______(表面) is covered by water.

79.　 Father had a big family to __________(支撑).

78.　 The ________(供应) of water is cut off, which we feel very inconvenient.

77.　 It doesn't ________(适合) you to have your hair cut short.

76.　 Tom __________(建议) us to go out for a walk.

75.　 All of a ________(突然), the dog rushed in.

74.　 In spite of great difficulty, we __________(成功) in doing the experiment.

73.　 With seven _________(科目) to learn, we are always busy.

72.　 The wounded soldier _________(挣扎) to his feet.