题目

71. Only by _______________（科学的）training can Liu Xiang make such rapid progress in the 110-meter hurdle. 72. His words left me the ___________________ （印象）that he didn’t like the plan at all. 73. The United Kingdom __________________（组成）of Great Britain and Northern Ireland. 74. He had never been knocked out in a __________________（职业的）fight. 75. It is said that you will be affected by the ________________ （辐射）if you talk on the mobile phone for long. 76. The ________________（火山爆发）of a volcano often brings lava and ash clouds. 77. We will have an opportunity to ________________ （交换）views tomorrow. 78. People can easily become __________________（精神上）addicted to drugs when they start taking them. 79. It is OK to leave an _____________（电的）appliance on as long as you are using it. 80. Having guaranteed that we would get there before five ,I _____________（惊慌）. 答案：71. scientific    72. impression    73. consists    74. professional    75. radiation 76.eruption    77. exchange     78. mentally     79. electrical    80. panicked

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