South America
Located mostly（most) in the southern half of the earth, South America is a very (41)_____(interest) continent. The northern part of the continent is (42)_____(cover). By the Amazon Rainforest, which is home to thousands of the plant animal species. It is a very important force (43)_____ (shape) the world's weather and climate patterns. And it is also important for the (44)_____ (develop) of the economy of South America. Products such as chocolate, rubber, coffee and many kinds of medicine are (45)_____ (harvest) from the plants found in the rainforest. Even the liquid from the skin of some species of tree frogs are being used as (46)_____ (experiment) medicines. Other parts of South America are very (47)_____ (differ).The Andes Mountains spread over the (48)_____（west) part of South America. The ranges, about 5500 miles long, are a continuous barrier, with many peaks rising beyond 2000 (49)_____（foot). Southern South America is an extremely (50)_____ (wind) and cold place where many species of penguins(企鹅), seals and whales live.
【正确答案】：1. interesting
2. covered
3. shaping
4. development
5. harvested
6. experimental
7. different
8. western
9. feet
10. windy
【题目解析】：1. 空格后是名词，此处应该填修饰物的形容词形式。
2. 空格前是be动词，句式为被动语态，填过去分词形式。
3. 空格前句式完整，此处为名词性从句，用动名词形式。
4. 此处需要动词做名词，用动名词形式。
5. 空格前为be动词，句式为被动语态，用过去分词形式。
6. 空格后为名词，所以要用形容词形式。
7. 该句为主系表结构，用形容词做表语，填形容词形式。
8. 空格后为名词，填形容词形式修饰part。
9. 空格前有量词，填复数形式。
10. 有风的和冷的都是形容place这个名词，所以填形容词形式。
