IN SYNCHRONIZED SWIMMING, THE COSTUME AND MUSIC ARE NOT JUDGED DIR...

35. In synchronized swimming, the costume and music are not judged directly, _______. Underwater

speakers ensure that swimmers can hear the music at all times.

a. with factors into the overall performance and "artistic impression"

b. as a result they are factors into the overall performance and "artistic impression"

c. but they are factors into the overall performance and "artistic impression"

d. because they are factors into the overall performance as well as "artistic impression"

Read the passage carefully and choose the correct answer.

Recreational diving or sport diving is a type of diving that uses scuba equipment for the purpose of

leisure and enjoyment. In some diving circles, the term "recreational diving" is used in contradistinction

to "technical diving", a more demanding aspect of the sport which requires greater levels of training,

experience and equipment.

Recreational scuba diving grew out of related activities such as snorkeling and underwater hunting.

For a long time, recreational underwater excursions were limited by the amount of breath that could be

held. However, the invention of the aqualung in 1943 by Jacques-Yves Cousteau and its development

over subsequent years led to a revolution in recreational diving. However, for much of the 1950s and

early1960s, recreational scuba diving was a sport limited to those who were able to afford or make their

own kit, and prepared to undergo intensive training to use it. As the sport became more popular,

manufacturers became aware of the potential market, and equipment began to appear that was easy to

use, affordable and reliable. Continued advances in' SCUBA technology, such as buoyancy

compensators, modern diving regulators, wet or dry suits, and dive computers, increased the safety,

comfort and convenience of the gear encouraging more people to train and use it.

Until the early 1950s, navies and other organizations performing professional diving were the only

providers of diver training, but only for their own personnel and only using their own types of equipment.

There were no training courses available to civilians who bought the first scuba equipment. Professional

instruction started in 1959 when the non-profit National Association of Underwater Instructors was

formed.

Further developments in technology have reduced the cost of training and diving. Scuba-diving has

become a popular leisure activity, and many diving locations have some form of dive shop presence that

can offer air fills, equipment and training. In tropical and sub-tropical parts of the world, there is a large

market in holiday divers, who train and dive while on holiday, but rarely dive close to home. Generally,

recreational diving depths are limited to a maximum of between 30 and 40 meters (100 and 130 feet),

beyond which a variety of safety issues make it unsafe to dive using recreation diving equipment and

practices, and specialized training and equipment for technical diving are needed.