(30)_____
A.exploring 
B.improving
C.developing
D.endangering

(27)______
A.one
B.the
C.a
D.some

VII. Mark the letter A, B, C, or D on your answer sheet to indicate the correct answer in each of the following questions.
Energy-saving bulbs should be used in every household to help save ________.
A.electric
B.electrical 
C.electrician
D.electricity

The immigration laws have been continually changed over the past few years for no logical reasons.
A. It is not fair that the laws have been changed so much over the past few years because of the flow of immigrants.
B.There’s no reasonable explanation as to why the immigration laws have been altered repeatedly in the last few years.
C.The reason why they changed the immigration laws recently has not been explained very convincingly.
D. The fact that the immigration laws have been continually changed over the recent years must have a reason.

Poor management brought the company to _________of collapse.
A. the edge    
B.the foot          
C.the brink    
D. the ring

________with the size of the whole earth, the highest mountains do not seem high at all.
 
A.Compare them   
B.If you compare       
C.When compared  
D.A comparison

The Internet has ________ developed and become part of our daily life.
A.increasing 
B.increases
C.increased
D.increasingly

He was sent to an island_________ only by birds.
A.lived   
B.resided          
C.occupying        
D. inhabited

Choose the correct answer to each of the following questions.
Your writing was not so convincing as ______.
A.Peter                       
B.of Peter’s   
C.Peter’s                    
D.Peter was

Choose the correct answer to each of the following questions.
_______do you meet each other? - Once or twice a month.
A.How far 
B.How long
C.How often 
D.How much