865. Old tunes are sweetest and old friends are surest.老调最甜美，老友最可靠。

864. Long ago, people believed that the world was flat.很久以前人们相信地球是平的。

863. It is more important to be healthy than bony slim.健康永远比皮包骨头好。

862. I"m thinking of hanging the lamp from the ceiling.我打算把灯吊在天花板上。

861. If you don"t work, you will fail to pass the exam.如果你不学习，你考试就会不及格。

860. If I were you, I would not be bothered by English.如果我是你，就不会为英语烦恼了。

859. I received an invitation, but I did not accept it.我收到-份请帖，但没有接受。

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。

857. If Tom cannot keep his promise, he"ll lose face.如果汤姆不能信守诺言，他就会丢面子。

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高兴。