79. It is time for us to take m__________ to stop air pollution in our city now.

78. He missed the bus as a r__________ of getting up too late this morning.

77. A good command (运用能力；掌握) of English e__________ you to communicate with foreign businessmen freely.

76. You can’t turn your dream into r__________ if you just sit there and watch TV all day.

60. A. challenging　　　　　 B. different　　　　　　　　 C. dangerous　　　　　　　　　 　 　 D. strange

59. A. worthless　 　　　 　　B. thoughtless　　 　　 C. hopeless　　　　　　　　 　 　 D. helpless