题目内容：

    One of the biggest ideas in computer technology is cloud computing. The system is changing the way information is kept. It uses a group of computers or servers to store information instead of one. The data floats around like clouds instead of being saved on any computer. It means computers can be smaller than ever and store practically unlimited amounts of information. No longer are bulky computers needed because all the information is in the clouds.

So when will cloud computing start affecting the way you use computers? You may not have noticed, but it already has. Facebook, Amazon, Twitter and many other sites all run on cloud computing. Cloud computing is really useful. You can use it to access the same file at work at home or in other countries on different computers. There may even be environmental benefits, too. Gmail, which uses cloud computing, says that the system saves a lot of energy.

However, potential problems do exist such as losing information and not being able to access certain files when the internet is down. Also, some companies charge fees for their cloud computing services. Another major problem is security. If all your Information is out there in the cloud and not safely stored on your own computer or laptop, it may be possible for other people to access it. More and more of our personal information is in danger of being stolen. Therefore, it is important to be careful and to find ways of making the information secure.

More and more companies are starting up and offering cloud computing. Will the company be reliable? What will happen to your data if the company goes out of business? There are real worries. Even so, for those interested in computing technology, one thing is for certain ---the future in the clouds is going to be very exciting.

1.How does the author describe the data?

A.It needs only a single server.

B.It is a cloud floating around computers.

C.It makes computers become smaller.

D.It improves the computer’s function.

2.What can we learn from the passage?

A.Cloud computing will come into use soon.

B.Files will be entered when the Internet is down.

C.Personal information may be lost if not kept properly.

D.Companies will enjoy free cloud computing services.

3.What’s the author’s attitude towards cloud computing?

A.Worried. B.Positive.

C.Unclear. D.Cautious.

4.The purpose of the passage is                .

A.to introduce cloud computing to us

B.to talk about the way computers change

C.to warn us to be careful to use computers

D.to tell us how to access information on other computers