21. Each of the 400 people received from their boss ______ gift £­ “Who moved my cheese?” , ______ best-seller in the US, which helped them understand how to deal with changes in their lives and work.

A. the; /       B. a; /         C . a; a         D. the ; a

22. Jane had prepared carefully for her English examination so that she could be sure of passing it on her first____________.

 A. intention    B. attempt       C. purpose     D. desire