New Words：

twig [twig] n. 小枝；嫩枝

Sample Sentences：

He made a fire with dry twigs.
Hera made some crowns from olive twigs.
A single twig breaks, but the bundle of twigs is strong.

single ['siŋgl] adj. 单一的；单个的；单身的；单人的
bundle ['bʌndl] n.捆；束；卷

New Words：

competitor [kəm'petitə] n.竞争者；对手
wipe the floor with 彻底击败；完全打败
get wind of 得知；听到…的风声

Sample Sentences：

That company is a strong competitor of us.
The police get wind of the plans to rob the bank.
They should be able to wipe the floor with any competitor.
Our competitor must not be allowed to get wind of our plan.

New Words：

modern ['mɔdən] adj. 现代的, 时髦的

Sample Sentences：

Modern video cameras are light and easy to carry.
She has very modern ideas about educating her children.
With the coming of modern technology, many jobs were lost.

New Words：

activity [æk'tiviti] n. 活动
inactivity [.inæk'tiviti] n.不活动；无活动力；不活跃

Sample Sentences：

The streets were noisy and full of activity.
Do you take part in any activity in your spare time?

Inactivity is a disease of modern man.
MEXICO CITY sprang back to life this week after two weeks of fear and inactivity.

modern ['mɔdən] adj. 现代的, 时髦的
spring [sprɪŋ] v. 跳；跃；蹦

New Words：

sack [sæk] 麻袋；床；睡袋

Sample Sentences：

I bet he's still in the sack.
An empty sack cannot stand upright.
There was a sack of corn in the corner of the barn.
They usually have activities such as the egg and spoon race and the sack race.
Sack-race：race in which competitors put both legs in a sack and move forward by jumping

activity [æk'tiviti] n. 活动
competitor [kəm'petitə] n.竞争者；对手