(单选题) Sooner or later the forests will disappear ( ).(本题1.0分)

A、 unless a country has a plenty supply of trees
B、 unless people stop cutting down their trees
C、 unless all people are taught the importance of planting trees
D、 unless the government punishes those who cut trees instead of plant
出自:黑龙江省教育学院口语(专升本)

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