Look,the bird_____(sing) on the tree.

Look,the bird_____(sing) on the tree. Listen,the bird_____(singing,is singing)in the tree. Look,the birds ______(sing) in the tree. Look at the biad on the tree 改错 Look!whose kite is it on the tree?改错 Look,there is a bird ------[ sing] in the tree.Litter-----[i Look!There is a little girl __________(sing) under the tree. on \ in the tree on the tree 和 in the tree on the tree与in the tree in the tree 和on the tree look at the picture,the boy___the tree.