21—25 CADAA 26—30 BBADA 31—35 BABCD
36—40 BCBAC 41—45 BCBCD 46—50 ABBCB
51—55 BADDA 56—60 ABDAD 61—65 DBBAD 66-70 CDABD
71.few 72.either 73.but 74.their 75.closest 76.ones 77.carefully 78.makes 79.successful 80.working
81. Yes, I do 。
82. What is your computer used for?
83. Do you like shopping online?
84. What do you like doing online?
85. Then you must have a lot of e-pals.