精选优质文档-倾情为你奉上A dog is always well-know as a clever and friendly animal. 狗因其聪明友善而著称。A friend of mine from high school is working in England now. 从高中认识的我的一个朋友现在在英国工作A good memory is of great help in learning a language. 良好的记忆对学习语言很有帮助。A lot of natural resources in the mountain area are to be exploited and used . 那个山区有许多自然资源有待于开发利用。Air pollution is more serious than water pollution. 空气污染比水污染更为严重All that glitters is not gold. 闪光的东西，未必都是金子。All things are difficult before they are ea
