1 . This kind of machine ________ cutting meat in big restaurant.

A．is used to

B．used to

C．is used as

D．is used for

2 . A trained dog can be used ________ the blind ________ a guide.

A．with; to

B．for; as

C．by; as

D．to; for

4 . A red lamp _________ a danger signal (信号).

A．looks like

B．is like

C．is used as

D．is used by

5 . — 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

6 . My cellphone ________ a camera when I travel with my family.

A．is used as

B．is used for

C．is used by

7 . A cellphone ________ a camera by most young people in China.

A．is used by

B．is used as

C．is used to

8 . 英语在中国用作外语。
English ________ ________ ________ a foreign language in China.

9 . English is used ________ the first language ________ Americans.

A．as, as

B．for, by

C．as, by

D．for, as

10 . The second “Tiangong Lecture” kicked off! Bing Dwen Dwen ________ a teaching tool!

A．is used for

B．was used for

C．is used as

D．was used as