根据句意及首字母或括号里的汉语或单词提示，把所缺单词写在横线上，并注意其变换形式。

66. He failed his math examination because of his            (care) work.

67. The art museum _________ (成功) in displaying the new paintings.

68. As students, we are s            to obey the school rules.

69. It's             (danger) to play football in the street．

70. Mary said she             (更喜欢) reading a book to watching TV.

71. There is h__________ any food in the fridge. Let’s go and buy some.

72. She has never made so many m            in answering such easy questions.

73. The lift can take us to the             (thirty) floor to see the nice scenery.

74. Her mother is Chinese and her father is             (Canada).

75. I like cooking. I think it is a good way to             (使…放松) myself.