21. Premier Wen stated in his report that _____ education of the young was always _____ hot and    serious topic.

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

22. It could take months before evidence appears on how the bomb was made, and who ________.

A. set it out                  B. set it up            C. set it loose                  D. set it off

23. Niagara Falls is a great tourist ______ drawing millions of visitors from all over the world every year.

 A. interest                B. view                  C. scene                 D. attraction