Unit 3 Computers reading课时作业

一、单项填空(共15小题；每小题1分，满分15分)

1.She clearly knows she lacks the skills to ________ this task，but recognizes that her cousin can help her.

A.demonstrate B.withdraw

C.accomplish D.accumulate

答案　C　[句意：她清楚地知道她缺少完成这个任务的能力，但是她意识到她的堂姐可以帮她。accomplish "完成"，符合语境。demonstrate "展示"；withdraw "撤退"；accumulate "积累"。]

2.The cost of living in big cities ________ steadily for many years，and it has led some youths to drop out of the big city race.

A.is climbing B.is being climbed

C.has been climbing D.has been climbed

答案　C　[根据题意可知，主语cost与谓语动词climb之间是主动关系，可以排除B、D两项；根据句中的时间状语for many years可知，此处表示许多年来大城市里的生活开支一直都在稳定上涨，故应用现在完成进行时表示从过去某时到现在一直都在进行且有可能继续下去的动作。]

3.A hurricane struck the east coast and the Red Cross ________ for help for victims，over two million dollars have been raised.

A.has appealed B.appealed

C.to appeal D.appealing

答案　D　[句意：一场飓风袭击了东海岸，红十字会呼吁救助灾民，筹集了200多万美元。分析句子结构可知，the Red Cross ________ for help for victims是独立主格结构，且the Red Cross和appeal是逻辑上的主谓关系，应用现在分词形式作状语。故选D项。]