New Words：

weak [wiːk] adj.虚弱的；无力的； 懦弱的; 软弱无力的

alike [əˈlaɪk]
adv.同样地;十分相像地;很相似地;两者都
adj.相像;十分相似

Sample Sentences：

She is still weak after her illness.
I was too weak to move or think or speak.
That bridge is too weak for heavy traffic.

My sister and I do not look alike.
They tried to treat all their children alike.
They all look so alike to me that I'm never sure which is which.

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.

New Words：

bottom [ˈbɒtəm] n. 底部;最下部

Sample Sentences：

The ship sank to the bottom of the sea.
We cleaned the house from top to bottom.
I found some coins at the bottom of my bag.
The water was so clear we could see the bottom of the lake.

New Words：

perhaps [pərˈhæps] adv. 也许；可能；大概

Sample Sentences：

‘You could do it yourself.’ ‘Yeah, perhaps.’
Perhaps you can tell me a little more about this.
Perhaps you don't know what you really want at all.

New Words：

enemy [ˈenəmi] n. 敌人；敌军；敌国；仇人

Sample Sentences：

The enemy are on the march.
Don't make an enemy of him.
The city is under enemy control.
They sent the enemy ship to the bottom of the sea.

bottom [ˈbɒtəm] n. 底部;最下部