It is a sunny day.Look!Many people are playing in a park.A old man is walking.A girl is catching butterflies.A boy is running.A man is reading newspaper.A woman is collecting leaves.They are happy.
六年级水平,A girl is catching butterflies.是什么意思？一个女孩正在捉蝴蝶
可以换成A girl is flying kites.一个女孩正在放风筝