pk10登陆平台1-5 CACBA 6-10 ABCAA 11-15 CABBA
pk10登陆平台16-20 CBCAB 21-25 BADDD 26-30 BACBA
31-35 BCADC 36-40 ABDDA 41-45 BACBA
46-50 DCCBD 51-55 DCBCA 56-60 AACBD
61-65 CBACA 66-70 DCDBB
71-80 (One possible version)
71. improve 72. Benefits 73. innovations
74. admiration 75. compulsory 76. burden
77. practical 78. Tips / Suggestion(s) / Advice
79. based 80. sense
书面表达（One possible version）
A study shows that many people do not take their lunch breaks seriously。 People are encouraged to refresh themselves outside the office and be responsible for their own health。
For many Chinese people, they have been accustomed to taking a nap during their lunch breaks。 They will feel refreshed after sleeping for about an hour after lunch。
As a senior three student, I usually take a nap during my lunch break. I have formed this habit since five years ago. I usually have three classes in the afternoon. Without a nap, I will feel sleepy and dizzy all afternoon, making me unable to concentrate on my lessons.
Some people think it is necessary to do some physical activities during the lunch break. But I think it will cost too much energy. So it is better to take a short break, which can make us work energetically and efficiently in the afternoon.