单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions.
Which of the following is NOT a proper way to clean the saved cans

A．Removing any labels.
B．Using drinking water.
C．Boiling the cans directly.
D．Washing cans with soap and water.

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单项选择题

单项选择题

Questions 11 to 13 are based on the following passage. At the end of the passage, you will be given 15 seconds to answer the questions. Which of the following is NOT a proper way to clean the saved cans 您的浏览器不支持 audio 元素。