﹣Have you been to the Beijing Expo(北京世园会) in Yanqing?
﹣Yes, it's a of art, gardening, and high technology.(collect)
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.
Mike often (收集)stamps and plays basketball in his spare time.
The big tree over there is probably one (百)years old.
It's not safe to leave a baby in a car by (它自己).