六、单项选择(共15分,每小题1分)
从下列各题所给的四个选项中,选出最佳选项。
(  )26. Parents are always strict _______ us ________ our studies.
      A. with; with         B. on; in     C. in; with       D. with; in
(  )27. Something strange _________ to him on his way to school this morning.
     A. was happened    B. took place   C. happened      D. was held
(  )28. Reading newspapers and magazines ________ what he enjoys most.
     A. is   B. are    C. was     D. have been
(  )29. If you want a round-trip ticket, sir, you’ll have to pay _________$80.
      A. another         B. other     C. each               D. more
(  )30. Bicycles are _________ in China than in Europe.
     A. widely used        B. the most widely used
     C. more widely used D. used widely