81. He seems to have __________ (忽视，忽略) one important fact.

80. Cycling is highly b__________ to health and the environment.

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.