题目内容：

Over the past few years I’ve had an uncomfortable sense that someone, or something, has been making changes to my brain. I’m not thinking the way I used to think. I can feel it most strongly when I’m reading. Involving myself in a book or a lengthy article used to be easy. That’s rarely the case any more.

I think I know what’s going on. For over a decade, I’ve been spending lots of time online. The Web has been a godsend to me as a writer. Research that once required days in the rooms of libraries can now be done in minutes by a few Google searches. Even when I’m not working, I’m scanning headlines or just tripping from link to link.

The Net is becoming a universal medium where information flows through my eyes and ears and into mind. The perfect recall of silicon memory (硅制存储器) can be a blessing to thinking. But that comes at a price. As the media theorist Marshall Mcluhan pointed out, media are not just passive channels of information. They supply the stuff of thought, but they also shape the process of thought. And what the Net seems to be doing is weakening my ability for concentration. Once I was a driver in the sea of words. Now I zip along the surface like a flying swallow.

I’m not the only one. When I mention my troubles with reading to acquaintances, Bruce Friedman, a blogger, also has described how the Internet has changed his mental habits. His thinking has taken on a “staccato (破碎)” quality. “I can’t read War and Peace any more” he admitted, “I’ve lost the ability to do that.”

A recently published study suggests that when reading online, we tend to become “more decoders (解码器) of information”. We are not only what we read; we are how we read.

1.According to the passage, the author thinks_______

A. the Net is merely a headache.

B. he can no longer die but swim shallowly.

C. the once naturally deep reading has become a struggle.

D. other people around rarely have similar feelings like him.

2.What is the author’s attitude towards the Internet?

A. Thoroughly passive.

B. Totally puzzled.

C. Gladly approving.

D. Evidently worried.

3.From the passage, the more people use the Web, _________

A. the more mental habits can be improved.

B. the more they have to fight to stay focused.

C. the more they are influenced in shape.

D. the more online activities they can enjoy.

4.Which of the following can best summarize the text?

A. Is the Net gradually making us stupid?

B. Long articles are hard to read nowadays.

C. Do people lack concentration to cover Web pages?

D. More Web involvement results from attention distraction(分心).