52．A．mouth                 B．nose                    C．ears                       D．eyes

51．A．bad                     B．useful                  C．terrible                  D．polite

49．The children won't climb the hill if it           this Sunday．

A．rain                     B．rained                  C．rains                      D．will rain

48．Did you know        ?

A．when would Mr. Wang come                    B．if he bought a camera yesterday

C．where he lives                                                  D．how much did the bike cost

47．Today computers           all over the world．

A．are used               B．were used            C．will use                  D．have used

46．The film is             one that I've ever seen．

A．more exciting                                          B．more excited

C．the most exciting                                       D．the most excited

45．He didn't feel very well yesterday，so mother told him             a rest．

A．to have                B．has                      C．had                        D．having

44．He could hardly believe what she said,               ?

A．didn't he                B．did he                  C．couldn't he             D．could he

43．The boy          I talked with just now is my best friend．

A．which                  B．that                     C．whose                    D．where