单项选择题

Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions.
Now, listen to the news.
When was the paintbrush first utilized

A．3,000 years ago.
B．5,000 years ago.
C．In the primitive society.
D．30,000 years ago.

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单项选择题

单项选择题

Questions 21 to 23 are based on the following news. At the end of the news item, you will be given 15 seconds to answer the questions. Now, listen to the news. When was the paintbrush first utilized 您的浏览器不支持 audio 元素。