According to the passage, what makes mobile phones potentially harmful is ________.

According to the passage, surfing______________.

The phrase “split off” in the second paragraph is closest in meaning to____________.

According to the passage, cellphones are especially popular with young people because ____________.

In the first paragraph, the word "elements" is closest in meaning to ________

We sometimes think of writing as more real than speech because ______.

According to the author, what is one reason why the Internet is sometimes slow?

According to the passage, which of the following statements was true in 1990?

The word “advantage” in the last paragraph most closely means ______.

According to the writer, people should_____

According to the passage, scuba diving______________

All of the following are advantages of business “Intranets” mentioned in the passage EXCEPT__________

In the author’s judgment, ______.

The main idea of this passage is that ______________.

The most suitable title for the passage could be________.