49．A．taken                   B．brought              C．caught               D．bought

48．A．at                      B．with                       C．for                  D．about

47．A．lonely                  B．alone                C．happily              D．silent

46．A．often                  B．usually                    C．seldom                 D．always

44．---Shall I tell Sally about it?

   ---No, you ____________．I’ve told her already.

A．shouldn’t          B．mustn’t              C．needn’t               D．can’t

43．I don’t know ______________.

A．where can we buy the tickets                     B．how much it costs to fly to Shanghai

C．who is he waiting for                          D．why was he late for school this morning

42．The 30th Olympic Games ______________ in London in 2012．

A．will hold                B．be held                      C．will be held         D．hold  

41．They __________ to that supermarket many times since they moved here.

A．have been               B．have gone                   C．will go           D．went     

40．Tom likes cars．He enjoys ______________ model cars of all kinds.

A．collects                    B．collected                    C．to collect         D．collecting