Do you know these fun facts? More than 3 billion people use the Internet;more than 200 billion emails are sent every day; the first computer mouse was made of wood...

    16     What do you know about the history of computers?

    17     Early computers could also do simple math like a calculator. In the 1930s, Alan Turing had the idea for a computer you could program to do different things.

    18     In the 1970s, computers were smaller and cheaper so people started to use them at home. In the 1980s, computer games were very popular. Lots of people bought computers just to play games. In 1989, Tim Berners-Lee invented the World Wide Web, which is a way to organize information on the Internet.     19    

Today people can use smartphones to play games, send emails and go on the Internet.     20    

"Where is the university?" This is a question that many visitors to Cambridge(剑桥)ask. But no one can give them a ___ answer, for there is no wall to be found ___ the university. The university is the city. You can find classroom buildings,____, museums and offices of the university all over the city. And most of ___   members are the students and ____ of the thirty-one colleges.

Cambridge was already a ___ town long before the first students and teachers arrived 800 years ___ .It grew up by the river Grant, and the river once ____ the Cam. A ___ was built over the river as early as 875. __ the town got its name "Cambridge".

In the fourteenth and fifteenth centuries more and   ___ land was used for college buildings. The town grew much __ in the nineteenth century after the opening of the railway in 1845. Cambridge became a __ in 1951 and now it has a population of over 100, 000.Many young students in __ countries __ to study at Cambridge. Thousands of people from all over the world come to visit the university town. It has become a famous place all around the world.

A man feared his wife wasn’t hearing as well as she used to and he thought she might need some hearing aid（助听器）. Not     36     sure how to help her, he called the family doctor to discuss the problem. The doctor told him there was a simple test the husband could do to give the doctor a better idea of her     37     loss（丧失）.

“Here’s what you do,” said the doctor. “     38     about 40 feet away from her, and call her in a usual conversational speaking tone（音调）see if she hears you. If not, go to 30 feet, then 20 feet, and so on     39     you get a reply.

That evening, the wife was in the kitchen, and he was in the yard. He said to     40    , “I’m about 40 feet away, and let me see     41     will happen.” Then in a usual tone he asked, “Honey, what’s for dinner?”

No reply.

So the husband moved     42     to the kitchen about 30 feet from his wife, and repeated, “Honey, what’s for dinner?”

Still no reply.

Next he moved     43     the dining room where he was about 20 feet from his wife and repeated, “Honey, what’s for dinner?”

Again he got no reply. He walked up to the kitchen door about 10 feet away. “Honey, what’s for dinner?” Again there was no reply.

So he walked     44     up behind her. “Honey, what’s for dinner?”

“Chicken! James, for the     45     time I’ve said that.”

In the early 1990s, the word Internet was strange to most people. But today, Internet has become     46     useful tool for people all over the world. Maybe Internet has been the greatest invention in the field of communication     47     the history of mankind.

Communicating with others on the Internet is     48     faster. We can chat with a person who is sitting in the other part of the world. We can e-mail our friends and they can read the e-mails within a minute.

Giving all kinds of information is probably the biggest advantage of Internet. We can use search engines to find the information     49     need. Just type in a keyword and the search engine     50     give us a list of suitable websites to look at.

We can enjoy a lot on the Internet by downloading games visiting websites.

There are some games for free. We can meet new and interesting people in the chat now.We can also listen to music and see films.