5. summary--summarize 　 6. wide--widen　　　　　　 7. strong--strengthen　　 8. threat--threaten 　　　　　　　　　　

1.　　　 proof--prove　　　 　　 2. preference-prefer　　　　 3. effect-affect　　　 4. modern--modernize 　　　　　　

4. How_______ he is! He is always acting_______ .He is really a ________.

A.foolish；foolishly；fool　　　　　 B.fool；foolish；fool

C.foolish；fool；fool　　　　　　　 D.foolishly；foolish；fool

II.　 Put the following words into verbs:

3. The shop owner welcomed all the guests with a______smile.　 A.practice　 B.practise　 C.practical　 D.practiced

2. The three- ___chair isn’t suitable for a young child.　 He may fall off.　 A.legging 　B.legged C.legs　　 D.leged

ⅠWarming up

1.　　　 That man was__enough not to tell the manager that he would not do the job.

A.care　B.careful　C.careless　D.carelessness

18. This is a very interesting book. I’ll buy it, ______.　

A. how much may it cost　 B. no matter how it may cost　 C. however much it may cost　 D. how may it cost

17. As is know to us, theory is ___practice and in turn serves practice.　

A. relied on　 B .depended on　 C. impressed on　 D. based on

16. As an economist, he was able to ____some light on the problem.　 A.put　 B.make　　 C.throw　 D.bring

15. Whenever you are in trouble, don’t hesitate _____me for help.　 A.asking　 B.to ask　 C. in asking　 D.to asking