21. People show great enthusiasm for fantasy movies, because they can make ____ unreal seem to be _____ real.

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

22. Mr. Green requires that the students ______ cheat in any exam.

A. won’t                     B. can’t                   C. wouldn’t             D. not

23. ______ most of its population of approximately 20 million people living near the coast, swimming and surfing are popular activities for many families at the weekend.

   A. As              B. With          C. For          D. Sinceks5u

24. Tom ______ full marks, but he was too careless and made a spelling mistake.

A. could gain B. could have gained    C. must have gained     D. must gain