单项选择题

Question 6 is based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Around how many tons of hazardous waste does the world produce each year

A．150 million.
B．1.50 million.
C．15 million.
D．50 million.

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单项选择题

单项选择题

Question 6 is based on the following news. At the end of the news item, you will be given 10 seconds to answer the question. Around how many tons of hazardous waste does the world produce each year 您的浏览器不支持 audio 元素。