2. swimming birds of the antarctic

From the information given in the passage, we can infer that dolphins …….
don’t breathe underwater
cannot survive in climates warmer than their body temperature
are among the largest marine animals
have difficulty surviving in captivity
use only one lung at a time

34. The risks and benefits of treating patients with medicines that combat mental illnesses _____ with the highest degree of medical training _____ any harmful effects.

must be approached / to prevent
should approach / to be prevented
may approach / to have prevented
could have approached / to prevent
need to be approached / prevent

35. _____ returning to Holland with nothing to report, the crew voted to look for the Northwest Passage, a legendary waterway that would carry a ship all the way from the Atlantic to the Pacific Ocean.

Still
Instead
Rather than
Might as well
Much as

36. Universities ______ a number of advantages by Athletic teams.

were being brought
bring
are brought
had brought
can bring

37. Rarely does she go to the cinema, _____?

isn’t it
is she
did she
doesn’t she
does she

38. SMALL WHALES

Dolphins and porpoises, often called simply «small whales,» are mammals, not fish, and are thus warm-blooded, keeping their body temperature nearly constant even when they are exposed to different environmental temperatures. The mothers provide milk for the young for a year or more. Like other whales, dolphins have lungs and breathe through a single nostril, called the blowhole, located on top of the head.
The blowhole is opened during their frequent trips to the surface to breathe. In contrast to some of the large whales, dolphins and porpoises have teeth, which they use to seize their food, consisting primarily of marine fish. Certain species of marine dolphins are the best-known biologically because they survive well in captivity, which means they can be more carefully observed. The bottle-nosed dolphin has been the most intensively studied because of its adaptability to salt-water holding tanks. It is a major participant in acrobatic shows at oceanariums and is noted for its curiosity toward humans.