阅读下面材料，在空白处填入适当的内容(不多于3个单词)或括号内单词的正确形式。

A rainforest is an area 【小题1】(cover) by tall trees with the total high rainfall spreading quite equally through the year and the temperature rarely dipping below l6℃. Rainforests have a great effect on the world environment because they can take in heat from the sun and adjust the climate.【小题2】 the forest cover, these areas would reflect more heat into the atmosphere,【小题3】 (warm) the rest of the world. Losing the rainforests may also influence wind and rainfall patterns, potentially causing certain natural disasters all over the world.

In the past hundred years, humans 【小题4】(begin) destroying rainforests in search of three major resources: land for crops, wood for paper and other products, land for raising farm 【小题5】(animal)．This action affects the environment as a whole.【小题6】 example, a lot of carbon dioxide (二氧化碳) in the air comes from burning the rainforests. People obviously have a need for the resources we gain from cutting trees 【小题7】we will suffer much more than we will benefit.

Rainforests are often called the world’s drug store. More than 25％ of the medicines we use today come from plants in rainforests. However, fewer than l％of rainforest plants have been examined for their【小题8】(medicine) value. It is extremely likely【小题9】our best chance to cure diseases【小题10】(lie) somewhere in the world’s shrinking rainforests.