英语阅读There is a park near our home.I can see many trees and f
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Some are walking and singing.Some are dancing or playing games.Some are cleaning the floor.Alice and her sister Diana are flying a kite.Dale and his brother Bruce are throwing a frisbee.Their father and mother are sitting under the tree.All the family are having a good time.

上面这些be doing的句型都是现在进行时啊

CDAAD