Why do forests in many parts of the world slowly disappear?
A. New trees are not looked after properly.
B. Many trees have been cut down by man.
C. Man has not paid enough attention to planting trees.
D. All of the above.
A. New trees are not looked after properly.
B. Many trees have been cut down by man.
C. Man has not paid enough attention to planting trees.
D. All of the above.
【答案】
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