-- Is this your sweater?

-- Yes, it's.  ____

①网络上结交的都是益友

②网络学习的效果一定比现实学习效果好

③网络可以帮助我们解决学习上的一切困难

④网络拓展了我们人际交往圈

如图，∠AOB是一个任意角，在边OA、OB上分别取OM=ON，移动角尺，使角尺两边相同的刻度分别与M、N重合，过角尺顶点C的射线OC便是∠AOB的平分线OC，这一做法用到三角形全等的判定方法是（　　）

   John lives on a farm. The farm is not very big. His parents grow rice and corn. They don’t use animals to do farm work any more. Today they use a tractor(拖拉机). It works faster and better. After he does his work in the fields, he likes to sit and look at the blue sky and the green hills. He thinks the country is more beautiful than the city. In the city, he can’t hear the animals. In the country, he can hear birds singing. He likes to play with his dog, Cody. Cody is a very interesting dog. He likes to follow people. When they stop, he stops.
   When they walk, he walks. John thinks Cody is the best dog of all.