55．A．Therefore               B．But                     C．Since                     D．Then

（A）

    Last year，some groups of students in their community（社区）made a survey about “How do people spend their free time?” The following diagrams show some results of it．

Diagram（1）：Hours for people of different ages who surf the Internet in week.

54．A．to carry                 B．to steal                C．carrying                 D．stealing

53．A．unpleasant something                                B．anything pleasant

C．dangerous something                                  D．anything dangerous

52．A．Making sure         B．To be sure            C．Make sure              D．Being sure