Sit down.

坐下！

My watch is fast and your watch is slow.

我的表快，而你的表慢。

After dinner I read a magazine and made some telephone calls.

在晚饭以后我读一本杂志和打了一些电话。

No,I'm not married.I'm still single.

没有,我没结婚，仍然是单身.

You have your choice of three flavors of ice cream.

你有3种风味的冰淇淋可选择。

He told me to take these pills every four hours.

他告诉了我每4小时吃一次这些药片。