9. sell out “卖完；送光” wear out “穿坏”

! Have a try!

12. living, alive 与 live

(1) alive 主要用作表语；

He must be still alive.

(2) living 可用作表语或定语，

Are your grandparents still living ?

Who is the greatest living poet ?

(3) live 只用作定语（前置）。

He bought some live fish.

Only a few live trees were left after the fire.

Unit13

1. 1. cut down 减少，砍伐，砍倒

He tried to cut down on smoking but failed.

他尽量少抽烟，但没成功。

We shouldn’t cut down trees, Instead, we should plant more trees.

cut up 切碎

cut off 切除

2. instead of 与instead

instead of 是介词短语，“代替；而不是”。