–Our classroom _________ twice a day. So it is very clean.
–It is important for us to do this.

–Our classroom _________ twice a day. So it is very clean.

–It is important for us to do this.

A．is sweeping        B．is swept           C．sweeps           D．has swept

A lot of books for learning English discuss problems of the modern world：pollution，too much traffic．Venice（威尼斯）has some of these problems．But the city has its own problems．For example，there are no cars in Venice，and very few people can drive．The traffic problem is caused by the boats．They go too fast and make the water damage the buildings．

Every year，between April and September，the water covers a lot of places the city．It goes into all the shops which are on the ground floor．And，of course，into people’s houses．In November 1979，the water rose more than a metre above the normal（正常的）level．This happened every day for a whole week．On some days，it happened twice．

People in Venice usually wear rubber boom（胶鞋）．In some places，there are high platforms（平台）to walk along．Sometimes offices have to close because the water can damage computers and machines．And，of course，it is terrible for old people．

Other problems in Venice are caused by too many tourists in summer．They move in large groups，and boats usually get very crowded．Prices in the hotels and restaurants arc often high．

However，people still think Venice is a good place to live in because it is a human city．

1．Why can very few people in Venice drive?

2．What happens from April to September every year?

3．How high was water in November 1979?

4．Why are boats very crowded in summer?

–Our classroom _________ twice a day. So it is very clean.
–It is important for us to do this.

1. A.
   is sweeping
2. B.
   is swept
3. C.
   sweeps
4. D.
   has swept

A recent survey shows that fewer people are reading books while far more have started to read online , especially young people . For many young people , there is only one kind of books ,schoolbooks .

● Books are not dead !

I am 63 and I use the Internet every day . Magazines and newspapers are not as important in my life as they used to be but I can imagine a world without books . Just as books did not replace (代替)writing and computers will not replace books . 

● Rich books！

There are so many books that it is impossible to put them all online . The Library of Congress in Washington , D.C. has over 110million items , while the British Library in London has about 150 million items .

● Danger !

Reading in poor light is very damaging to eyes . Technology has improved recently , but it is still bad for your eyes to look at a computer screen for too long .

● Books are easy to get !

I f you want to read a book , you don’t have to turn the computer and look all over the Internet for it . You can go to libraries or bookshops to get it .

So think twice before you throw your books away !

(    )36. The survey shows that more ______like to read online than any other group .

A. old people        B. young people         C. workers          D. teachers  

(    )37. According to the “Rich books” section , we are told ________ .

A. a good way to read books online

B. that there are a small number of books in libraries

C. that it is wrong to put all books online

D. that not every book is online

 (    )38. What does the writer mainly try to tell us ?

A. Reading online is cheaper than reading real books . 

B. Reading online is not good for your eyes .

C. Reading real books is still important .  

D. You can throw away your books now .