New words：
sweater [ˈswetər] n. 毛衣wool [wʊl] n. 羊毛；(羊等的)绒，毛；毛线；毛织物
Sample Sentences：
You must be boiling in that sweater!
You've got your sweater on inside out.
She wore a sweater made of pure wool.
Washing wool in hot water will make it shrink.
shrink [ʃrɪŋk] v. 收缩；减少；退缩；畏缩
New words：
party [ˈpɑrti] n. 政党；党派
Sample Sentences：
She belongs to the Labour Party.
This party was founded ten years ago.
The Communist Party of China (CPC) is the world's largest political party.
New words：
found [faʊnd] v. 建立；创建；创立；成立
Sample Sentences：
The college was founded in 1920.
Our class will found a book-sharing corner soon.
The Communist Party of China (CPC) was founded on July 1, 1921 in Shanghai.
New words：
socialism /ˈsəʊʃəlɪzəm/ n. 社会主义
Sample Sentences：
We are fighting for the great cause of socialism.
Marx and Engels founded the theory of scientific socialism.
The main purpose of socialism is to make people's life better.
cause [kɔz] n. (支持或为之奋斗的)事业，目标，思想
found [faʊnd] v. 建立；创建；创立；成立
New words：
communism ['kɒmjunɪzəm] n. 共产主义；共产主义制度
the Soviet Union 苏联 [ˈsoʊviet]
Sample Sentences：
We say that socialism is the first stage of Communism.
I will fight for the cause of communism as long as I live.
People talked about communism when they mentioned the Soviet Union.
cause [kɔz] n. (支持或为之奋斗的)事业，目标，思想