9．A．using                    B．to use                  C．used                    D．used to

8．A．dare                      B．have to                C．should                 D．might

7．A．business                B．information          C．things                  D．trouble

6．A．against                  B．on                       C．with                    D．to

5．A．quickly                 B．quick                   C．hurry                     D．sharp

4．A．still                       B．yet．                   C．already                D．too

3．A．for                        B．as                        C．at                        D．with

2．A．become    B．had become   C．have become                             D．will become

1．A．more and more popular                                B．more popular and more popular

   C．popularer and popularer                             D．more popular and popular

20．The girl was heard                the piano in the next room．

    A．plays                   B．to play                 C．played                 D．play

（A）

    Mobile phones are becoming 1     not only with grown ups but also with students．Meanwhile，they also  2  a problem for middle schools in the past few years．Some children have got mobile phones  3  Christmas or birthday gifts，and more will  4   want them．

    Many like SMS because it is easy and   5  ．Some parents felt happy because they could get in touch   6   their children．Some teachers said mobile phone use was a distraction（分心的事）to students during school hours and it also gave them much 7 in their class-rooms．Sometimes students   8  use phone messages to cheat（作弊）during exams．A new study found that some teenagers send messages in class even hurt their fingers because they can't stop  9  SMS．

    Many teachers suggested that students should not have phones at school，  10  if there was a good reason，they could  11   their phones at school office．And even they can use the telephone in the teachers' office  12  ．Many people think they understand  13   parents would want their children to have them，  14   they agree school should let the students  15  when they can use their mobile phones．