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

New Words：

take part 参与，参加

Sample Sentences：

He is ill, so he didn't take part in the picnic.
We all had to take part in the training run, with nobody excepted.
Canadians of all ages take part in this festival across the country.

New Words：

personal ['pə:sənl] adj. 私人的；个人的
experience [iks'piəriəns] n. 经验；经历

Sample Sentences：

All hire cars are for personal use only.
I have something personal to discuss with you.

She had no experience of life at all.
Please tell us about your experiences in Africa.

New Words：

base [beis] n. 根据；基础；基地；底座

Sample Sentences：

Many languages have Latin as their base.
The book is based on personal experience.
She used her family's history as a base for her novel.
Our company's base is in ShangHai, but we have branches all over the country.

personal ['pə:sənl] adj. 私人的；个人的
experience [iks'piəriəns] n. 经验；经历