New Words：

duty [ˈdjuːti] n. 责任；职责；义务；值班
through [θruː] 穿过；通过

Sample Sentences：

My duty is to look after the animals.
It is my duty to report it to the police.

First I have to get through the exams.
Can you go through the wood alone at night?
Go through this gate, and you'll see the house on your left.

New Words：

corner [ˈkɔːrnər] n. 角；拐角；街角；墙角
serve [sɜːrv] v. 服务；提供；接待

Sample Sentences：

I hit my knee on the corner of the table.
Students come here from the four corners of the world.
Write your address in the top right-hand corner of the letter.

To serve the people is our duty.
Breakfast is served between 7 and 10 a.m.
This man would go through fire and water to serve his friend.

duty ['duti] n. 责任；职责；义务；值班
through [θruː] 穿过；通过

New Words：

wise [waɪz] adj. 充满智慧的;明智的;英明的
strange [streɪndʒ] adj. 奇怪的；奇特的；异常的；陌生的

Sample Sentences：

She made a very wise decision.
It was wise of her not to go there alone.

A strange thing happened this morning.
Don't you think he's a little bit strange?
Don't you think his car is making a strange noise? Tell him to mend it, please.

New Words：

trousers [ˈtraʊzərz] n. 裤子;长裤
helmet [ˈhelmɪt] n. 头盔;防护帽

Sample Sentences：

How much is that pair of trousers?
Mother bought me a pair of trousers.
He was dressed in a shirt, dark trousers and boots.

I really sleep good in this new bike helmet.
People hate to wear a helmet because it's thick and heavy.

New Words：

refuse [rɪˈfjuːz] 拒绝;回绝

Sample Sentences：

I don't believe that he'll refuse to help me.
It was wise of him to refuse to spend his money.
Why did you refuse to give her a hand? She has given you so much help.