New Words：

letter [ˈletər] 信;字母

Sample Sentences：

I had a letter from my sister.
There's no date on this letter.
We could write a letter to your father.
What do the letters SOS mean?
What is the middle letter in the word 'son'?

New Words：

copy [ˈkɒpi] n.复制品 ；v.复制
copier [ˈkɒpiə(r)] 复印机
photocopier [ˈfoʊtoʊkɑːpiər] 复印机

Sample Sentences：

I'll do you a copy.
I'll do a copy for you.
I will send you a copy of the report.
Also, you can copy and send it to your friends.
Please add paper to the copier.

New Words：

fire balloon 热（空气）气球
hot air balloon 热（空气）气球

New Words:

thief [θiːf] 贼;小偷;窃贼
thieves [θiːvz] thief的复数;thieve的第三人称单数

Sample Sentences:

The dog ran after the thief.
The thief was jailed for one month.
A thief ran off with hundreds of pounds yesterday.

The thieves cut a hole in the fence.
Watch your bag ─ there are thieves around.

New Words：

stole [stoʊl] steal的过去式
stolen [ˈstoʊlən] v.steal的过去分词；adj.偷得的；偷走的

Sample Sentences：

He stole her money.
He stole money from her.
My wallet was stolen.
How much money was stolen?