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  3. The world population today is about 6 billion. But only about 1 percent of t

The world population today is about 6 billion. But only about 1 percent of t

游客2023-09-21  41
问题     The world population today is about 6 billion. But only about 1 percent of the world’s land is【T1】______for farming. However, the area of farmland is becoming smaller and smaller every year. So it will be difficult to feed so many mouths. There are several reasons why farmland is【T2】______First, a lot of the land is being used for the【T3】______of houses. Secondly, some of the land has become wasteland because【T4】______have removed the top soil. Thirdly, some of the land has become too salty to【T5】______. Therefore, a big problem that we face today is hunger. [br] 【T3】
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答案 building
解析 由空格前的the和其后的of推断需要填入名词性成分。本句讲耕地减少的其中一个原因，根据空格前的“土地被用来……”及空格后的houses，可推测空格处是“建造房子”的意思。结合录音，填入building。
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