New Words：
bump [bʌmp] v.碰；撞
bump into 偶然碰到；遇见；(意外)撞到
Sample Sentences：
She bumped her head against a tree.
You could fall off the bed and bump your head!
In the dark I bumped into a chair.
I am really so sorry to bump into you.
I often bump into him at the supermarket.
New Words：
indoor [ˈɪndɔːr] adj.（在）室内的；在户内进行的；在室内用的
outdoor [ˈaʊtdɔːr] adj.户外的；野外的；露天的
Sample Sentences：
Badminton is an indoor game.
Did you go to swim in the indoor swimming pool?
Children all like outdoor sports.
Outdoor exercise makes us strong in mind and body.
New Words：
pleasure [ˈpleʒər] n. 快乐；高兴；愉快；乐事
Sample Sentences：
She took no pleasure in her work.
He finds great pleasure in reading.
It is a pleasure to welcome you to our home.
'Thank you for helping me.' — 'My pleasure.'
New Words：
yet [jet] adv.还；已经；现在；迄今为止；用于否定句和疑问句
Sample Sentences：
The moon has not risen yet.
‘Are you ready?’ ‘No, not yet.’
Has he finished the work yet?
I didn't receive a letter from him yet.
New Words：
plastic [ˈplæstɪk]
n.塑料
adj.塑料制的；塑料的；
Sample Sentences：
Plastics don't rust like metal.
We can use plastic to make cups.
Put your washing in the plastic bag.
A kind of plastic stuff is used to make the plates.