Teachers say that the digital(數(shù)字) age has had a good influence and a not-so-good influence on American teenagers. More than 2,000 middle and high school teachers took an online survey. Researchers also spoke with teachers in some groups. Most teachers think the Internet and digital search tools have had a mostly positive influence on their students' research habits and skills. But at the same time，some teachers also point out some problems in teenagers' using digital search tools.

The Pew Internet Project did the survey with the College Board and the National Writing Project. Judy Buchanan is the director of the National Writing Project and a co-writer of the report. She says digital research tools are helping students learn more, and learn faster. "Both teachers and students really welcome these tools because they make learning exciting. And the goal is to really help students become creators of something meaningful, and not just users of the online information.”

But one problem the survey found is that these technologies make teenagers have short attention spans(持續(xù)時(shí)間). As there is huge amount of information about different subjects on the Internet, teenagers' attention is easily drawn away from their research.

Another problem the survey found is that many students trust the information they find on the Internet too much. Judy Buchanan says these students have not developed the skills to judge the online information. They need to learn a lot to tell if the information is believable. It's something that really has to be paid attention to.

One more problem the survey found is something that might not seem like a problem at all: being able to quickly find information online. Many students think "doing research" now means just doing a quick search on Google. Teachers say the result is a drop in the wish and ability of their students to work hard to find answers. That is, they are overly dependent on search engines and do not make enough use of printed books or research librarians.

Many teachers also say that the Internet makes it easy for students to copy work done by others instead of using their own abilities.

1.The result of the survey shows .

A.digital search tools need to be greatly improved

B.digital search tools are generally good for teenagers

C.teenagers have difficulty in using digital search tools

D.American teachers enjoy using digital search tools

2.Using digital search tools makes teenagers .

A.less trusting of online information B.more independent in doing research

C.more willing to work hard to find answers D.less able to pay full attention while searching

3.To do better in research, teenagers should .

A.spend more time searching online B.ask their teachers for more advice

C.make better use of printed materials D.learn more knowledge of search tools

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