从供选择的答案中，选出应填入下面叙述中{ }内的最确切的解答，把相应编号写在答卷的对应栏内。

All of these applications will enhance the { A } of life and spur economic growth. Over half of the U.S. work force is now in jobs that are information { B } . The telecommunication and information sector of the U.S. economy now { C }for 12 percent of the Gross Domestic Product, groing much faster than any other sector of the economy. Last year the { D }in this sector exceeded 700 billion dollars. The U.S. exported over 48 billion doooars of telecommunication equipment { E }.

A：①quantity ②quality ③mass ④amount

B：①based ②bassed ③bases ④base

C：①look ②looks ③account ④accounts

D：①revenues ②expenses ③outputs ④loss

E：①among ②alone ③simple ④single

【解析】

题中A处显然指生活质量，应选择②。

B处则是个语法问题，是被动语态。

C处从语义上看是“占多少比例”，"account for"是习惯用法，注意一下语法，谓语动词是单数。

D处指财政收入，只有"revenues"一词符合。

E处是“单独”、“独自”的意思，语法上是副词作状态，选"alone"。

参考译文：所有这些应用软件会提高人们的生活质量，刺激经济增长。现在美国半数以上的劳动力所从事的工作依赖于信息。在美国经济中，电信和信息门类占国内生产总值的12%，而且增长速度也比其他经济门类都快。去年该行业收入超过7000亿美元。美国电信设备的出口额超过480亿元。

【答案】A：② B：① C：④ D：① E：②