21—30 ADBAD BCABD 31—40 CABAB BDCCA

　　41—50 DBACA CDABC 51—55 DBBCD

　　56. trains → train 57. it → which 58. on → to 59. see → read 60. such → so

　　61. when → until 62. wait → wait a 63. 正确 64. were → was

　　65. very → much / 去掉very

　　Ping Ping is a film fan. He is interested in films very much.

　　One Sunday afternoon, a new film "True Lies" would be shown. Ping Ping wanted to see it very much. It was four thirty and he ate his supper as quickly as he could. after supper he put on his cap and hurried downstairs. He ran all the way and did not know his cap fell on the ground. when he got to the cinema, it was already five o'clock. He bought a ticket in a hurry and rushed in. He found his seat and sat down. When he looked up, he found that the film had not arrived yet.

　　How disappointed he was!