a bird is singing in the old tree

a bird is singing in the old tree bird the in singing tree is a 连词成句 The bird in the tree is singing.划线部分提问 in the tree 是划线部分 单选题：1,Look,what is in the tree?-----There is 填空bird singing 鸟儿在树上唱歌——翻译：The bird is singing （in） the tree. Listen,the bird is singing in the tree.listen 为什么不用加ing? they heard a bird singing in the tree on their w() to school In the tree there is a bird .可以改为:There is a bird in the tre There is a bird on the tree.on the tree or in the tree A bird is singing on that tree单词改错 A bird is singing __the tree填方位动词 There is a bird in the tree 改为一般过去式