5. expensive/dear. 直译即可。

4. At the time. 直译即可。

3. surprised. "感到惊奇"一般用"be surprised"形式。

2. history. 直译即可。

1. are busy. "忙于做某事"一般用"be busy doing sth."，"be"动词必须与主语在人称和数上保持一致。

14、根据上下文和括号里的汉语提示，在下面短文的空白处写出正确的单词或词组。使短文意思完整，语句连贯。

　　 Most of us 1_______(忙于) talking about and using the Internet every day， but how many of us know the 2______(历史) of the Internet？ Many people are 3_______(感到惊奇) when they find that the Internet was set up in the 1960s. 4_______ (那时 )， computers were large and 5_______(贵的)。 Computer networks didn't work 6______ (好) .If there was 7_______(出故障) with one computer in the netr work， the whole network stopped， so a new network system had to be set up. It should be good enough to be used by many 8______(不同的) kinds of computers. If 9______(任何部分) of the network was not working， information could be sent through another part. 10______(用这种方法) computer network system would keep on working all the time……

　　 答案分析

10. opening.结合上下文，倒奶救火、救人。倒奶容易，但“开那么多奶瓶”确是不易。注意，这里的opening是动名词，作句子的真正主语。

9. lives.the lives of eight people意指“八条人命”。

8. reached.结合文意和语法结构，动词后是名词，显然要用一个以“r”打头的及物动词。

7. everywhere.前面句子主、谓、宾具全，结合后面的“used 320 pints of milk to stop the fire”，显然是用奶灭的火。用“everywhere”表明“到处都是奶”。