Old Henry is over eighty but he is still in good（）（healthy）.

I don’t think after-school（）（activity）will take too muc...

填空题I don’t think after-school（）（activity）will take too much time.

All of us spent an（）（enjoy）day on the farm last Sunday.

填空题All of us spent an（）（enjoy）day on the farm last Sunday.

鸟类的主要特征是什么？

问答题鸟类的主要特征是什么？