题目内容：

    How many phone numbers can you remember by heart? It’s probably fewer than you would like. Actually, you’re not alone. Some said that they couldn’t recall the phone numbers of their friends and neighbors. And others said that they couldn’t remember their relatives, phone numbers. In their eyes, there is no point in filling their heads with phone numbers if they’re all stored in smart phones that are with them almost all the time.

In fact, most people are suffering from a sort of digital amnesia(健忘). More than 90%℉ those agreed that they used the Internet as an online extension of their brains. Rote memorization(死记硬背) was once an important part of education, but we just need a click the computer or slide now. That’s making us worse at remembering things.

However, I believe that there are more risks to this new world of memory beyond losing our ability to recall some information such as who the 15th President was. That kind of information may always be a click away, but the important things are personal ones, like the way your parents smile at your wedding. It’s harder to recall or find online. If you’re relying on yourself to keep track of those memories, they will be much more meaningful.

1.Paragraph 1 is mainly used to ________.

A.serve as the background of memory B.introduce the topic

C.explain a new research D.study people’s memory

2.What’s the main cause of people’s suffering from digital amnesia?

A.Dealing with too many things.

B.Seldom thinking about questions.

C.Relying on the Internet too much.

D.The changes of their meme.

3.What’s the author’s attitude towards people’s memories now?

A.Worried. B.Optimistic. C.Disappointed. D.Confident.