2. 外语
  3. The main purpose of this passage is to______. What should all countries do to help solve the problem of global warming?

The main purpose of this passage is to______. What should all countries do to help solve the problem of global warming?

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问题 The main purpose of this passage is to______.
What should all countries do to help solve the problem of global warming?
选项 A、They should replace all the harmful substances.
B、They should willingly undertake legal commitments about their energy uses.
C、They should hold another world conference on climate change.
D、They should provide advanced technology.
答案B
解析 细节题。根据第二、三段，可知目前存在的全球气候变暖问题，主要原因是有些国家不愿做出减少有害物质排放量的法律承诺。因此，要解决问题，就需要所有国家在使用能源方面做出法律上的承诺。因此B是对的。
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