Questions 27-30 For each question only ONE of the choices is correct. Write the corresponding letter in the appropriate box on y

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问题 Questions 27-30
For each question only ONE of the choices is correct. Write the corresponding letter in the appropriate box on your answer sheet.

*

选项 A、kerosene as a cooking fuel.
B、biomass as a cooking fuel.
C、solar power as a cooking fuel.

答案B

解析
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