题目内容
( ) 23. Holly has fed the dog,but she hasn’t watered the flowers .
A. still; already B. already; yet C. yet; still D. yet; already
23. B already用于陈述句中，yet用于否定句或疑
问句的末尾。
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work computer million stop talk use surprise send teach cheap expensive useful |
We are all busy 66 about and using the Internet,but how many of us know the history of the Internet?
Many people are 67 when finding that the Internet was set up in the 1960s. At that time,computers were large and 68 Computer networks(网络）didn’t work well. If one computer in the network broke down,then the whole network 69 So a new network system had to be set up. It should be good enough to be used by many different 70 If one part of the network was not working,information could 71 through another part. In this way computer network system would keep on 72 all the time.
At first the Internet was only used by the government,but in the early 1970s,universities,hospitals and banks were allowed 73 it too. However,computers were still very expensive and the Internet was difficult to use. By the start of the 1990s,computers became 74 and easier to use. Scientists had also developed the software (软件)that made “surfing” the Internet more convenient.
Today it is easy to get online and it is said that 75 of people use the Internet every day. Sending e-mails is more and more popular among students.
The Internet has now become one of the most important parts of people’s life.
66. 67. 68. 69. 70.
71. 72. 73. 74. 75.