A. stayed; did B. stays; did C. stayed; does D. stay; do

A. had B. will have C. is having D. has had

A. are B. be C. is D. am

A. That’s OK B. NO. Stand up

C. Thank you D. That’s all right

A. a great many B. huge amounts of

C. a large number of D. too many

A. most confident B. more confident

C. more confidently D. most confidently

A. for B. to C. about D. with

A. /; / B. the; the C. /; the D. the; /

A. flew B. will fly C. are flying D. have flown

Today the Internet is widely used in homes, schools, and businesses around the world. However, that hasn’t always been the case. The Internet was first developed in the 1960s and 1970s by U.S. government scientists as a way of sharing information. The earliest Internet was called ARPAnet. In 1969, only four computers were connected to the ARPAnet. Just 20 years later, though, as computers became more commonly developed, over 80,000 computers were connected.

Use of the Internet has continued to grow rapidly. Experts think that about 1% of the world’s population used the Internet in 1996. By 2008, that percentage grew to nearly 24%.

How do scientists count more than 1 billion users? Programs called Web Crawlers look through the Internet to see how many people are using the Internet and which pages they are visiting. They also make copies of webpages, which are stored by search engines. Web Crawlers work and collect information once they are started. These programs are sometimes called “spiders” because they “crawl” around the Web.

These programs collect and send information 24 hours a day. So if everyone stops using the Internet for one day, the Internet will still be a pretty busy place. Even when people are not online, these programs travel the Internet.

【1】The information in the first paragraph shows the idea that the Internet ____.

A.is available mainly in the United States

B.has a wider use today than it did in the past

C.is seldom used by people in other countries

D.is used mainly by government scientists today

【2】From the third paragraph, we can know that scientists use Web Crawlers to ____.

A.clean the webB.catch the spiders

C.find the InternetD.count the users

【3】According to the chart, which one of the statements is TRUE?

A.There were much fewer people who used Internet in 2000.

B.There were more than 500 million Internet users in 2000.

C.The number of Internet users became less from 2000 to 2008.

D.Use of the Internet grows slowly between 2000 and 2005.

【4】The underlined word “Boom” in the title means ____.

A.a loud noiseB.a government job

C.a rapid increaseD.a computer program