855. How would you go to Beijing, by air or by train?你怎样去北京，是乘飞机还是坐火车?

854. His vanity was hurt by their talking so frankly.他们坦率的谈话伤害了他的虚荣心。

853. He usually drops in at my place on his way home.他常常在回家的路上顺便来看看我。

852. Would you please go to a dancing party with me?请你跟我一起去参加一个舞会好吗?

851. We are all taking medicine against the disease.我们都服药治疗疾病。

850. This way, he can kill two birds with one stone.这样他就能两全其美。

849. They have to work hard to support their family.他们必须努力工作来支持他们的家。

848. There are a lot of people in the swimming pool.游泳池里挤满了人。

847. Please ask her to call me back when she"s back.她回来时请让她给我回个电话。

846. No wonder you can"t sleep when you eat so much.你吃这么多难怪睡不着。