74. Do you know how much colors there are in a rainbow?

　　　　　　　　　 A　　 B　　　　　 C　　 D　　　　 　(　 )__________

73. Mary felt happily because her aunt gave her a present.

A　 B　　 C　　　 　　D　　　　　 　　　　　(　 )__________

72. He would not mind do extra work for his school.

A　　　 B　　　 C　 　D　　　 　　　　　　　(　 )__________

71. I don’t know what to wear. Could you give me some advices?

　 　　　　　　A　　 B　　　　　　 C　　　　　 D　　 　(　 )__________

70. The life in a middle school isn’t ________ (real)boring.

C) 下列各句A、B、C、D中有一处错误，请在不改变句子意思的前提下，将正确答案写在题后的横线上。

69. The boy tried to open the juice can with a opener but ________ (fail).

68. Do you know if there is any ________ (different)between “see” and “look at”?

67. The girl practices _______ (play)the piano for two hours every day.

66. Jim is happy to live on the ________ (twelve)floor because he enjoys the scene out of the windows.

65. They are so kind to help us ________ (解决)many problems when we are in trouble.

B) 根据句子意思，用括号中所给单词的适当形式填空。