841. I assure you that you will feel no pain at all.我保证你根本不会觉得疼的。
842. I can‘t afford to go to a restaurant every day.天天都去餐馆吃饭，我真是支付不起。
843. I left at 6：00 so that I could catch the train.我六点钟出门，以便赶上火车。
844. I‘m afraid I have some rather bad news for you.我恐怕有些很坏的消息要告诉你。
845. Learn to say the fight thing at the fight time.学会在适当的时候说适当的话。
846. No wonder you can‘t sleep when you eat so much.你吃这么多难怪睡不着。
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。
848. There are a lot of people in the swimming pool.游泳池里挤满了人。
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。
850. This way， he can kill two birds with one stone.这样他就能两全其美。
851. We are all taking medicine against the disease.我们都服药治疗疾病。
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？
853. He usually drops in at my place on his way home.他经常在回家的路上顺便来看看我。
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。
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？
856. I cannot express how glad I am to hear from him.我无法表达我接到他的信时有多兴奋。
857. If Tom cannot keep his promise， he‘ll lose face.假如汤姆不能信守诺言，他就会丢面子。
858. I‘ll still love her even if she doesn‘t love me.即使她不爱我，我还仍然爱她。
859. I received an invitation， but I did not accept it.我收到－份请帖，但没有接受。
860. If I were you， I would not be bothered by English.假如我是你，就不会为英语烦恼了。
861. If you don‘t work， you will fail to pass the exam.假如你不学习，你考试就会不及格。
862. I‘m thinking of hanging the lamp from the ceiling.我打算把灯吊在天花板上。
863. It is more important to be healthy than bony slim.健康永远比皮包骨头好。
864. Long ago， people believed that the world was flat.很久以前人们相信地球是平的。
865. Old tunes are sweetest and old friends are surest.老调最甜美，老友最可靠。
866. She makes it clear that she doesn‘t like swimming.她明确地表示她不喜欢游泳。
867. The constitution guards the liberty of the people.宪法保护人民的自由。
868. The doctor examined the soldier‘s wound carefully.大夫仔细检查了战士的伤口。
869. The harder I study， the better my English will be.我越努力，我的英语就会越好。
870. The sun was shining and the sky was crystal clear.阳光闪烁，天空湛蓝。