New words：
classic [ˈklæsɪk]
n.名著；优秀的典范
adj.经典的；典型的
Sample Sentences：
He enjoys reading the classics in his free time.
He gave a classic example to explain the theory.
This is a classic novel that everyone should read.
It’s a classic mistake that new learners often make.
theory [ˈθiəri] n. 理论；原理；学说；原则
New words：
hurricane [ˈhʌrɪˌkeɪn ]n.（尤指西大西洋的）飓风
Sample Sentences：
The hurricane destroyed the whole village.
We stored water and food for the hurricane.
After the hurricane, volunteers came to help.
New words：
urgent [ˈɜrdʒənt] adj. 紧急的；紧迫的；迫切的；urgently ['ɜːdʒəntli] adv. 紧急地；急迫地urgency [ˈɜrdʒənsi] n. 紧急；紧迫性
Sample Sentences：
Can I see you for a moment?’ ‘Is it urgent?’
The money could be better spent on more urgent cases.
I need to speak to her urgently.
He urgently begged a favour of me.
The storm urgency to our plans to leave.
There’s no urgency — we can take our time.
New words：
rooster [ˈrustər] n. 公鸡；雄鸡
Sample Sentences：
The rooster's crow woke me.
I was born in the year of the Rooster. Roosters usually crow in the early morning.
New words：
thunder [ˈθʌndər] n. 雷；雷声 thunderstorm [ˈθʌndərˌstɔrm] n. 雷暴；雷雨；雷雨交加
Sample Sentences：
Outside, thunder boomed and crashed.
Turn off the TV set in case of thunderstorm.
The day was heavy and still. It would probably thunder later.