New Words：

penguin [ˈpeŋɡwɪn] n. 企鹅
group [ɡruːp] n.组;群;批;类

Sample Sentences：

Penguins are not afraid of people.
It is well known that penguins live in the Antarctic.

Which group do you think did the best job?
A group of us are going to the theatre this evening.

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