6. The ( ) person is liable to succeed in the challenge.

A. social

B. gracious

C. friendly

D. sociable

7. The police showed responsibility ( ) the preservation of public order and security.

A. forB. to

C. inD. on

8. He doesn’t feel ( ) when he is left ( ).

A. alone…alone

B. lonely…lonely

C. alone…lonely

D. lonely…alone

9. Take a hat with you ( ) the sun is very hot.

A. in case

B. though

C. for fear

D. in that case

10. A ( ) of the camel is its ability to live for a long time without water.

A. quality

B. feature

C. characteristic

D. character

答案　6. D7. A8. D9. A10. C