A. favorable        
B. precious    
C. essential      
D. worthwhile

A. three times the weight of              
B. three times weight of
C. as three times heavy as                
D. three times as heavier as

A. exhaustedly but excitedly  
B. exhaustedly but excited  
C. exhausted but excitedly  
D. exhausted but excited

A. three times the size as          
B. the size three times of
C. three times as the size of        
D. three times the size of

1. There is no          (令人信服的) evidence that smoking causes lung cancer.
2. I hope you will always be            (充滿精力的)when having classes.
3. She is an o       scientist , for she has made great contributions to her country.
4. Her mother never shouts at her in          (怒氣)
5. He a         to the teacher for being later for class.
6. Every year a large number of            (商人) go to and from Yiwu.
7. Without the teacher's p         , you can't play with the computer in our classroom.
8. The company in NanJing e         about 20000 boxes of wine to the UK last year.
 9. She is s         to support a family on a very low income.
10. He was ill and          (因此)could not come.

A. proud
B. curious
C. eager
D. content

A. twice as big    
B. twice bigger  
C. twice the size      
D. twice the big

A. Honest and clever students      
B. Students who honest and clever    
C. Honest students and clever      
D. Students are honest and clever

A. a seven-days    
B. a seven-day 
C. seven day  
D. seven-days

A. positive
B. cautious
C. optimistic
D. accurate