They are broadening the bridge to ________ the flow of traffic.
[     ]
A.put off  
B.speed up
C.turn on  
D.work out
We don't know who ____ for the murder, but the policemen will tell us the truth soon.

[     ]

A. is to blame
B. is to be blamed
C. is blaming
D. is to be blaming
We firmly believe that war never settles anything. It only ________ violence.
[     ]
A. runs into  
B. comes from
C. leads to  
D. begins with
Our class is a happy family. which________16 boys and 19 girls.
[      ]
A. consists of  
B. is consisted of
C. makes up    
D. is made up