题目内容：

    While you are at the bookstore, you may be faced with a difficult decision: e-books or paper books? Each one has its advantages and disadvantages. Making the best decision depends on many factors.

An e-reader can carry a whole library wherever you go, which is great for travelers or those who always want a choice of reading materials. Although e-readers are convenient, high levels of screen brightness from an electronic device (电子设备)can cause eye problems. A study in the Information Science Research found that young people preferred e-readers, like smart phones or iPads. That’s why most teenagers are short-sighted (近视).

Many book lovers still prefer paper books and value the feeling of them. Paper books are very well designed, they look and smell good, and they carry with them a more human touch. Avid (热衷的) readers prefer reading on paper. Perhaps this is their choice because paper books give them a sense of ownership. It is reported that reading on paper rather than an electronic screen is better for memory and focus. But paper books are heavy and they are not convenient to carry. Which is your decision, an e-book or a paper book?

根据短文内容选择最佳答案。

1.The underlined word “factor” in the passage means “________” in Chinese.

A.事实 B.因素 C.动力

2.If you are a traveler who wants to read books, you can choose ________.

A.e-readers B.paper books C.a library

3.Most teenagers are short-sighted because ________.

A.they always read books

B.they were born so

C.They often use e-readers like smart phones or iPads.

4.Which of the following is NOT TRUE according to the passage?

A.E-readers are convenient for people but they can cause eye problems.

B.All people prefer e-readers, like smart phones or iPads.

C.Reading on paper is better for memory and focus.

5.What is the main idea of the passage?

A.The advantages and disadvantages of the e-reads.

B.Factors about decisions on e-readers or paper books.

C.Why young people like to choose e-readers.