单元检测

第一部分　听力(略)

第二部分　阅读理解(共两节，满分40分)

第一节(共15小题；每小题2分，满分30分)

阅读下列短文，从每题所给的A、B、C和D四个选项中，选出最佳选项。

Personal computers and the Internet give people new choices about how to spend their time.

Some may use this freedom to share less time with certain friends or family members，but new technology will also let them stay in closer touch with those they care most about.I know this from personal experience.

E­mail makes it easy to work at home，which is where I now spend most weekends and evenings.My working hours aren't necessarily much shorter than they once were but I spend fewer of them at the office.This lets me share more time with my young daughter than I might have if she'd been born before electronic mail became such a practical tool.

The Internet also makes it easy to share thoughts with a group of friends.Say you do something fun or see a great movie perhaps and there are four or five friends who might want to hear about it.If you call each one，you may tire of telling the story.

With e­mail，you just write one note about your experience，at your convenience，and address it to all the friends you think might be interested.They can read your message when they have time，and read only as they want to.They can reply at their convenience，and you can read what they have to say at your convenience.

E­mail is also an inexpensive way to stay in close touch with people who live far away.More than a few parents use e­mail to keep in touch，even daily touch，with their children at college.

We just have to keep in mind that computers and the Internet offer another way of staying in touch.They don't take the place of any of the ways.

21．The purpose of this passage is to ________.

A．explain how to use the Internet

B．describe the writer's joy of keeping up with the latest technology

C．tell the value and usefulness of the Internet

D．introduce the readers to basic knowledge about personal computers and the Internet

答案　C

解析　写作意图题。短文第一段是主旨句，接下来几段通过对e­mail的便利应用的介绍