答案:
21-25 DBCBD 26-30 BACAB 31-35.ADCAC 36-40.BEFCA
41-45 BBDCD 46-50 AACAC 51-55 CABDB 56-60 ADBDC
61. has celebrated/has been celebrating 62.the 63.in 64.Interestingly
65. focusing 66.connection 67.which 68.to follow
69. more 70.join
71.stands--stood 72.conveying--conveyed 73.best前加our
74. and--or 75.actions--action 76.as--into 77.however--whatever
78.Thoroughly--thorough 79.very--too 80.删除short前的a