Directions: Each passage below is followed by questions based on its content. Answer the questions on the basis of what is stated or implied in each passage. Questions 1 - 2 are based on the following passage.

Although much about dolphin communication
remains a mystery, scientists have discovered three
distinct sounds that dolphins frequently make: chirps,
clicks, and whistles. Scientists have learned that dolphins
(Line 5) use clicks to create a sonar map, which allows them to
navigate and hunt. But apart from possibly transmitting
location, the clicks do not appear to serve any
communication purpose. Rather, research indicates that
dolphins communicate with each other by whistling. This
(Line 10) discovery has necessitated further investigation, as
scientists are not yet sure whether the whistles comprise
a complex system of linguistic communication or a simple
set of sonic cues like the ones used by other animal species.

The passage indicates that the whistles mentioned in line 4 are significant in part because they

The statements in the passage provide evidence that most directly supports the conclusion that

Questions 3 – 6 are based on the following passages.

Passage 1
Internet access has become an increasingly
necessary and invaluable workplace resource for
countless American businesses. However, like most
technological advancements, this one has also brought
(Line 5) with it significant drawbacks. More specifically, recent
survey results released by several workplace watchdog
organizations demonstrate that an alarming 60 percent
of employees are likely to visit Web sites for personal use
while at work, a 20 percent increase over the previous
(Line 10) year. In addition--and even more discouraging for
management executives charged with keeping
productivity levels high--some workplace studies suggest
that the average employee spends more than 33 minutes
online every day tending to personal needs, a number
(Line 15) supported by usage statistics gathered from many of the most popular shopping and personal-care Web sites
themselves.

Passage 2
In the ongoing, and often hushed-up battle between
corporate management and their own employees, new
(Line 20) statistics reveal that a growing number of executives are turning to advanced surveillance techniques to
monitor and crack down on so-called inappropriate
Internet usage at work. Yet, while such methods have
proven to be effective at restoring workplace
(Line 25) productivity, some employee-advocacy groups have
begun to raise serious ethical questions. With 77 percent of
American businesses now committed to carefully
monitoring the Internet-browsing habits of their workforces,
the stakes have never been higher. In particular, while there
(Line 30) are numerous arguments both for and against this trend, the legal questions surrounding possible violations of employee privacy rights could be dire.

In line 15, "supported" most nearly means

The author of passage 2 uses the phrase "the stakes have never been higher" (line 29) to suggest

The passages differ in tone in that passage 1 is

Both passages illustrate the idea that Internet access in the workplace