New Words：
precious [ˈpreʃəs] 珍奇的;珍稀的;宝贵的;珍贵的
Sample Sentences：
You're wasting precious time!
I didn't touch your precious car!
You do not know how precious your gift is.
I know this is precious to you , and I'll take the care of it.
gift [ɡɪft] n. 礼物；天赋；才能；赠品
New Words：
crazy ['kreɪzɪ] adj. 疯狂的；神经病的；不理智的
Sample Sentences：
What a crazy idea!
I thought she was probably a little crazy.
I know it sounds crazy but it just might work.
Don't you think it is crazy to go out in such hot weather?
New Words：
disk [dɪsk] 磁盘;磁碟;硬盘
Sample Sentences：
My computer can't read the disk.
You can't copy your file with this disk, it's full.
There is not enough space on the disk. You need a new hard disk.
New Words：
rub [rʌb] v. 擦;磨;搓;揉
Sample Sentences：
The cat rubbed itself against my legs.
She removed her glasses and rubbed her eyes.
It was cold, so he rubbed his hands together.
If you write on the blackboard, rub it off at the end of the lesson.
New Words：
stranger ['streɪndʒər]
n.陌生人；外地人；新来者
adj.“strange”的比较级
Sample Sentences：
She looked at me as if I was a stranger.
We've told our daughter not to speak to strangers.
How could you leave him to have supper with a stranger?
Could you show me around the factory please? I'm a stranger here.