天冷时，请穿上暖和的衣服。（完成译句）
Please warm clothes when it's cold.
People around the world can hardly （避免） buying products made in China.
I often see an old man with （灰色）hair sweeping the road near my school.
Traditional Chinese （药）has been playing an important role in treating COVID﹣19.
The big tree over there is probably one （百）years old.
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