Choose the best option

The Internet has become a commonplace for us. While【C1】______the Internet, we should not【C2】______the alarm bells sounding in our ears, reminding us of keeping【C3】______for online crimes. Last year, the Melissa and Explore Zip virus caused chaos【C4】______the Internet. Last week the "I love you" bug played havoc【C5】______the world. What will be the next？ No one knows.
Many on-line crimes are not so different to【C6】______seen in real world, the spreading of fake data, cheating and blackmail,【C7】______property rights infringements, and privacy violations. But computer hackers also create new forms of crime【C8】______the Internet changes the world into a "global village".
With the【C9】______of e-business, on-line crimes could not only cause great damage to【C10】______, but could also threaten the【C11】______of national political, economic and cultural orders. The【C12】______legal system in most countries【C13】______weak when dealing with on-line crimes,【C14】______to the sophisticated technology involved. For this reason, many countries are considering【C15】______Internet laws to curb on-line crimes.
 
1. A. surfing
B. operating       
C. reaching       
D. exploring
 
2. A. neglect      
B. overlook
C. omit    
D. ignore
 
3. A. guard
B. careful   
C. alert    
D. aware
 
4. A. in   
B. on     
C. inside    
D. with
 
5. A. over
B. on      
C. across    
D. through
 
6. A. which       
B. that     
C. them     
D. those
 
7. A. intellectual     
B. intelligence      
C. knowledge       
D. cultural
 
8. A. until  
B. before   
C. as       
D. after
 
9.A. blossom       
B. gloom      
C. blooming       
D. booming
 
10. A. persons    
B. individuals      
C. country
D. society
 
11. A. equality
B. peace    
C. security  
D. safety
 
12. A. current     
B. today’s       
C. nowadays
D. contemporary
 
13. A. proving
B. proves   
C. prove    
D. proven
 
14. A. owe   
B. as      
C. thanks   
D. due
 
15. A. shaping    
B. founding
C. formulating      
D. setting