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　　1. After our computer network ________ for the third time that day， we all went home.

       A. crashed B. collided C. smashed D. fell

       2. In a sudden of __________ anger， the man tore up everything within reach.

       A. attack B. burst C. split D. blast

       3. The ________ of gifted children into accelerated classes will start next week according to their academic performance.

       A. segregation B. specification C. spectrum D. subscription

       4. When he finally emerged from the cave after thirty days, John was ___________ pale.

       A. enormously B. startlingly C. uniquely D. Dramatically

       5. If you don’t ___________ smoking, you’ll never get better.

       A. give off B. give out C. give over D. give up

答案及解析：

1．【答案】A
【解析】由句子中的computer network可知，要填入的动词与计算机网络系统有关。crash可以表示“计算机由于软硬件发生故障而停止运行”，与题意相符；collide意为“运动中的物体或人猛撞某物或互相撞击；意见等相冲突”。smash意为“粉碎；痛击，猛击；撞毁”；fall意为“落下，跌落”。

2.【答案】C
【解析】本题也是近义词辨析，四个选项动词都有“扩大”的意思，但要跟后面的宾语operation搭配，只有C项expand适合。所以C为本题正确答案。

3．【答案】A
【解析】segregation的意思是“分开，分离”，与句意相符。其他三项中，specification“详述，规范”；spectrum“光谱，频谱”；subscription“捐献，订阅”，都不正确。

4.【答案】B
【解析】startlingly“惊人地”；enormously“极大地”；uniquely “独一无二地”；dramatically“戏剧性地”。

5.【答案】D
【解析】give off意为“发出，冒出”；give out意为“发表，用完”；give over意为“交托，留出”；give up意为“放弃，交出”。