85. One of the ______ (俄国)　 looks healthy and happy.

84. My little sister is fond of 　　　　　　(收集) stamps.

83. He was very______ ( 感激) to us because we gave him a hand when he was in trouble.

82. The man____________( 过去常常 ) get up early, but now he doesn’t.

　　 根据所给汉语提示，用该单词或词组的适当形式来完成该句。

81. Yesterday was her father’s______( 四十 )　 birth­day.

80. This is the most interesting film that I have ever seen. (同义句转换)

I have 　　　　　　　such an interesting film before.

79. We have an English party once a month.　 (就划线部分提问)

____________do you have an English party?

78. The question isn’t　 easy.　 I can't answer it.　 (合并为一个复合句)

The question is______ difficult ______ I can’t　 an­swer it.

77. Both of us have been to the Great Wall,　　 (改为否定句)

______of us______been to the Great Wall.

　 按括号内要求改写句子。

76. You should finish your homework in an hour.　 (改为祈使句)

______your homework in an hour,　 _______.