695. The doctor began to operate on the boy.医生开始给那个男孩动手术。

694. Please fetch a chair from another room.请到别的房间取一把椅子。

693. Jack is the strongest boy in the class.杰克是全班最强壮的男孩。

692. It was a lazy, breezy autumn afternoon.这是一个懒散的，起风的秋日下午。

691. It is no use learning without thinking.学而不思则惘。

690. If you would only try, you could do it.只要你肯尝试，你一定能做这件事。

689. I have just heard from my sister, Mary.我刚收到我妹妹玛丽的一封信。

688. I fell in love with her at first sight.我第一眼见到她就爱上了她。

687. I don"t like what you are saying.我不喜欢你说的话。

686. I don"t know if I"ll have the patience.我不知道我有没有耐心。