They are looking at the bird in the tree(对划线部分提问) 划线是 looking at the bird in the tree_____ ______ they _____?是 What are they looking

问题描述:

They are looking at the bird in the tree(对划线部分提问) 划线是 looking at the bird in the tree
_____ ______ they _____?
是 What are they looking

What are they doing?