86. When did man begin to explore the Antarctic?

1. About 100 years ago.
2. In this century.
3. At the beginning of the 19th century.
4. In 1798.

87. What must the explorers be, even though they have modern equipment and techniques?

1. Brave and tough.
2. Stubborn and arrogant.
3. Well-liked and humorous.
4. Stout and smart.

88. What is planned for the continent?

1. Building dams along the coasts.
2. Setting up several summer resorts along the coasts.
3. Mapping the coast and the whole territory.
4. Setting up permanent bases on the coasts.

89. What kind of metals and minerals can we find in the Antarctic?

1. Magnesite, coal and oil.
2. Copper, coal and uranium.
3. Silver, natural gas and uranium.
4. Aluminum, copper and natural gas.

90. The most healthy climate in the world is ____.

1. in South America
2. in the Arctic Region
3. in the Antarctic Continent
4. in the Atlantic Ocean

(Reference keys.)