Some of his suppliers are the family enterprises that_____their own offsprings?

A.use  

B. Employ 

C. Demand  

D. sack

This strong performance led several Chinese technology companies to try and_____its success.

A.replicate 

B. indicate 

C. fabricate 

D. dedicate

These courses in law will enable students to become_____in a particular area of law.

A.specialized 

B. functional 

C. special 

D. extinguished

The department offers a course in Opera Studies as a_____subject.

A.subsidiary 

B. superior 

C. inferior 

D. helping

Even if peace should come to the Middle East， many problems would still_____to be solved.

A.demand  

B. require  

C. exist  

D. remain