试题答案
1-5 BCBAC     6-10 ACBAA     11-15 BACCB     16-20 ABCCB
21-25 ACDBC   26-30 DCABB
31-35 BABCD   36-40 ACBAD    41-45 ABDBC     46-50 CDDAB
51-54 BCDC     55-58 DBAC     59-62 BDBC       63-66 BDDC       67-70 BAAD
71.What puzzled us 
72. to have acted 
73. has been working hard 
74. the healthier 
75. both of which
76. will he even give 
77. would have called you 
78. find it strange 
79. Seeing the happy scene
80. No matter when / Whenever you buy

短文写作
One possible version：
Diligence is a virtue. Being diligent can result in our success. Being diligent doesn't mean that we are so stupid that we should pay much hard work for our success than others. Instead, being diligent is to show our quality of perseverance.
As the old saying goes that diligence can make up for the inadequacy of birth. It reminds of my classmates’ experience of being diligent. One of my classmates is a clever boy, who always can remember well what should be learnt in the classroom. Another is a girl who always has difficulty understanding what teacher says in the class, but works harder. To our surprise, Lily always can get higher marks than Tom does in the exam.
Success can't be gained without diligence. Diligence is even more important than intelligence.