New Words：

festival [ˈfestɪvl] n. 节；节日

Sample Sentences：

I can't spend the festival with you.
May I invite you to organize the Food Festival with me ?
Wish all of my friends to be happy on the Dragon Boat Festival!

New Words：

referee [ˌrefəˈriː] n. 裁判;裁判员

Sample Sentences：

A referee must know all the rules of the game.
The referee blew his whistle to end the match.
The referee showed two red cards in the game today.

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.