1 . Wood can __________ __________ __________ (被用于……) making paper.

2 . He ________ quiet but now he is very outgoing.

A．used to

B．is used to

C．is used for

D．used to be

3 . —How do you often go to work ?
—I ________ take a bus, but now I am used to walking .

A．used for

B．am used to

C．used to

D．get used to

4 . As a mountain climber, Aron ________ taking risks.

A．used to

B．is used to

C．is used for

D．use to

5 . The gloves ________ keeping our hands warm.

A．are used to

B．are used for

C．used to

6 . A fireman uses a hose to put out fires.（保持原意基本不变）
A hose is _________ __________ putting out fires.

7 . — English is widely spoken in the world, isn’t it?
— Yes, It’s used _________ an official language in many countries.

A．for

B．as

C．with

D．by

8 . People use keyboards for typing. (改为被动语态)
Keyboards ________ ________ ________ typing by people.

9 . 钢笔是用来写字的。
Pens are ________ ________ writing.

10 . 邮票被用来寄东西。
Stamps are ________ ________ sending things.