We should learn by our mistakes. 我们应该从错误中汲取教训。
Do you know how many countries there are in the world now?
My sister and I wash the dishes by turns. 我和姊姊轮流洗碗。
Please make two copies of this document for me.
Tomatoes are rich in vitamin C, which helps tissues, bones, and teeth.西红柿有很丰富的维生素C，对身体组织、骨骼、牙齿都有好处。
The Wangs like animals very much. 王家一家人都喜欢动物。
They have three dogs and two cats. 他们养了三只狗、两只猫。
I have many hobbies, like collecting coins, reading novels, and watching movies. 我有很多嗜好，像是收集钱币、读小说、和看电影。内容来自 听力课堂网：http://www.tingclass.net/show-5855-219836-1.html