New Words：
operate [ˈɒpəreɪt] v. 操作；工作；运转；动手术
operation [ˌɒpəˈreɪʃn] n. 操作；运行；运作；手术
Sample Sentences：
The doctors operated last night.
We will have to operate on his eyes.
Will I need to have an operation ?
He had an operation on his knee.
It was foolish of him to go jogging so soon after his operation.
foolish [ˈfuːlɪʃ] adj. 愚蠢的; 傻的
New Words：
soldier [ˈsoʊldʒər] n.士兵;军人
Sample Sentences：
The soldier pointed his gun at the thief.
Can I be a soldier when I grow up, Mother? asked Kenny.
My good friend Mike wants to be a soldier when he grows up.
New Words：
system [ˈsɪstəm] n. 系统；体系；制度；体制
Sample Sentences：
Your system is now ready to use.
Do you know a lot about this computer system?
Hey, I wanted you to hear my new sound system.
New Words：
quite [kwaɪt] adv. 很；相当；非常；完全
Sample Sentences：
She is quite a lovely girl.
We drank quite a lot of wine.
This is quite a different problem.
I'm quite happy to wait for you here.
New Words：
whistle [ˈwɪsl]
n.哨子；口哨；汽笛；汽笛声
v.吹口哨；吹哨子
Sample Sentences：
Can you hear the train whistle?
The referee finally blew the whistle to stop the game.
Please whistle when you need help.
Do you know how to whistle ? You just put your lips together and blow .
referee [ˌrefəˈriː] n.裁判;裁判员