The changes possibly caused by the cellphones are mainly concerned with________,

According to the passage, surfing______________.

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

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

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

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

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

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

According to the passage, scuba diving______________

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

In the author’s judgment, ______.

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

According to the writer, people should_____

The main idea of this passage is that ______________.

The passage implies that __________________.