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。

685. I can't make this machine run properly.我无法使这部机器正常运转。

684. He hired a workman to repair the fence.他雇用了一个工人修理围墙。

683. He has to take care of his sick mother. 他得照顾他生病的母亲。

682. Could I have those two tickets, please?这两张票给我行不行?

681. You should learn these words by heart. 你应该把这些词背熟。

680. You can't go in no matter who you are. 不管你是谁，都不能进去。