Nowadays many people like to have dogs as their pets. Dogs are friends of man not only because they are lovely but also because they are faithful to their masters.
Dogs can do a lot of work for man. They play with us. They hunt with us. They keep door for us. But long ago, dogs all over the world were wild.
Dogs can date back to the Stone Age. All dogs have the same ancestor. It is believed that their ancestor was much like a wolf. Other animals, such as the fox, came from this ancestor, too. Hundreds of thousands of years ago, man began to tame wild dogs. After the dogs were tamed, they were trained. The strong dogs became working animals. They were trained to pull heavy loads. They learned to keep an eye on the sheep and other animals. Working dogs had other jobs, too.
Some dogs were not strong. But they could help man hunt for game. Other dogs were best as pets.
Today, there are more than 100 kinds of dogs in the world.
冲刺必看:大学英语四六级语法全面的解析
通过文章的阅读学习英语六级词汇(二十二)
四十天突破大学英语六级考试讲义与笔记的词汇(14)
大学英语六级轻松的学单词(4):abate
四十天突破大学英语六级考试讲义与笔记的词汇(12)
四十天突破大学英语六级考试讲义与笔记的词汇(9)
通过文章阅读学习英语六级的词汇(二十一)
大学英语四六级考试旅游词汇的积累之住宿篇
通过文章的阅读学习英语六级词汇(十)
四十天突破大学英语六级考试讲义与笔记的词汇(6)
四十天突破大学英语六级考试讲义与笔记的词汇(18)
四十天突破大学英语六级考试讲义与笔记的词汇(24)
大学英语六级完形填空题的预测
四十天突破大学英语六级考试讲义与笔记的词汇(3)
大学英语六级轻松的学单词(16):abiding
新英语六级考试常用词汇的搭配116条
四十天突破大学英语六级考试讲义与笔记的词汇(10)
大学英语六级轻松的学单词(19):ablution
四十天突破大学英语六级考试讲义与笔记的词汇(17)
通过文章的阅读学习英语六级词汇(二十)
四十天突破大学英语六级考试讲义与笔记的词汇(5)
大学英语四六级每日冲刺的词汇:艺术类
四十天突破大学英语六级考试讲义与笔记的词汇(16)
通过文章的阅读学习英语六级词汇(八)
四十天突破大学英语六级考试讲义与笔记的词汇(1)
大学英语四六级每日冲刺的词汇:社会道德类
通过文章的阅读学习英语六级词汇(二十九)
大学英语四六级每日冲刺的词汇:人物性格类
大学英语六级轻松的学单词(13):abhor
大学英语六级轻松的学单词(1):abacus
| 不限 |
| 英语教案 |
| 英语课件 |
| 英语试题 |
| 不限 |
| 不限 |
| 上册 |
| 下册 |
| 不限 |