問題詳情

   Does the Earth have enough natural resources to support the ever-growing population? Many researchers around the world view the question 31. suspicion. We all know that the Earth's resources are limited. First, fresh water is very 32. for our health and survival. But around 97 percent of the water on Earth is salt water. In other words, only three percent of the water on Earth is fresh water, three quarters of 33. , however, is frozen at the North and South Poles. Second, the amount of land that can be used to grow food is limited, too. Year by year, more and more land is lost because cities grow and roads are built. Third, clear air is another important natural resource. 34. , the air is being polluted all the time. Most of the pollution comes from burning fossil fuels. So, if we worry about the upcoming doomsday, the nightmare may come true when we are 35. these natural resources.
31.
(A) with
(B) as
(C) for
(D) of

參考答案

答案：A
難度：非常困難0
統計：A(1),B(0),C(0),D(2),E(0)

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