21. In ________ situations like this it is not surprising that the local persons become angry.

A. contrary      B. extreme          C. official             D. entire

22. The question of ________ English will keep on changing in the future is easy ________.

A. if; to answer it                      B. whether; to answer  

C. that; to be answered                  D. /; answering

23. ________ the Normans spoke French for the entire 250 years they ruled England, French did not replace English as the first language. 

   A. Unless            B. Until                C. Now that             D. Even though