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。

679. You can kill two birds with one stone.一举两得。

678. Why don"t you attend an aerobic class? 你为什么不去参加一个有氧健身班呢?

677. Why don"t I pick you up at your house? 为什么不让我去接你呢?

676. Where can we make the insurance claim? 我们可以在哪里提出保险赔偿?这个无法与那个比较。