He’s teaching me French my teaching him Chinese.
| 
   A.in place of  | 
  
   B.in case of  | 
  
   C.in exchange for  | 
  
   D.in honor of  | 
 
Instead of staying the same every day, Mary’s working hours are .
| 
   A.limited  | 
  
   B.available  | 
  
   C.valuable  | 
  
   D.flexible  | 
 
My money . Could you please lend me some?
| 
   A.has run out of  | 
  
   B.was running out  | 
  
   C.has run out  | 
  
   D.was run out of  | 
 
The boy was curious about how the waste paper was into a model kite.
| 
   A.improved  | 
  
   B.united  | 
  
   C.transformed  | 
  
   D.mixed  | 
 
Not unti his fellows criticized him _______ to admit his mistake.
| 
   A.does he begin  | 
  
   B.did he begin  | 
  
   C.began he  | 
  
   D.had he begun  | 
 
After taking part in several rounds of competition, the athlete won first prize.
| 
   A.eventually  | 
  
   B.occasionally  | 
  
   C.frequently  | 
  
   D.usually  | 
 
