問題詳情

     On average, approximately one acre of the world’s prime rainforest is lost every second. This is 50 , because the forests are vital link in the ecological chain. Life on earth is inter-dependent,51 the forests, thousands of plants, insects and animals would perish. Growing forestsproduce oxygen and remove carbon dioxide, 52 is the major cause of global warming. They arealso an integral part of the water cycle that 53 the forests and the surrounding countryside. Theroots help bind the soil, and the canopy provides a shield against the 54 effects of heavy rainfall.
50
(A) disastrous
(B) incredible
(C) inorganic
(D) worried

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