Huckleberry Finn，the great character from the Mark Twain book，did not like school

Huckleberry Finn，the great character from the Mark Twain book，did not like school．He preferred floating down the Mississippi River on a raft and looking for adventure．That’s why generations of schoolboys have loved reading Huckleberry Finn：they feel the same way about the school as he did．
For many boys，being forced to sit all day in a school room is like being punished for a crime they did not commit．There are endless hours of boredom spent learning things they have no interest in．That’s why many boys do poorly in school and many give up on education altogether．
Ironically(具有讽刺意味的是)，the whole idea for schools was invented for boys．If a boy wanted to grow up to be a useful man，he had to be educated．By and by，people realized that educating girls was a good idea，too．And，ironically again，it was discovered that the schoolsystem suits girls just fine；so fine that girls now do much better than boys in school．
No one really knows why that is．Some say that girls mature(发育成熟)quicker than boys and adapt better to school life．Some also say that the school system and the curriculum(课程) have changed to encourage girls but the needs of boys have been overlooked．
Educators are now trying to find ways to get boys to be more successful in school．There are suggestions to separate the sexes and teach boys separately．There are also suggestions to change the curriculum to make it more interesting for boys．
Whatever the changes are，boys still will be boys，and dreams of floating down the Mississippi River will always be an attractive choice to just sitting in a classroom．
47. Huckleberry Finn is________.
A. a boy of Mark Twain’s B. a character in a book
C．an American writer D．a river’s name
48．Many boys do poorly in school because________．
A. they give up on education
B．they’re punished for a crime they did not commit
C．they have no interest in the things they’re learning
D．they prefer floating down the Mississippi River on a raft
49．The underlined sentence in Paragraph 4 means that________．
A. more boys are needed B. boys need to be cared about a lot
C．the needs of boys have been very important
D. People have paid little attention to the needs of boys.
50．Which of the following is NOT true according to the passage?
A. Girls now do much better than boys in school.
B．The school system has changed to encourage girls．
C．Girls mature quicker than boys and adapt better to school life．
D. The curriculum has changed to be more interesting for boys.

答案：BCDD

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谢谢解答

解：（1）∵A、O、B三点共线，
∴∠AOC+∠BOC=180°，
∴∠AOC的补角是∠BOC；

（2）∵∠FOA=90°，
∴∠AOC+∠3=90°，
∵∠3=∠4，
∴∠AOC+∠4=90°，
∴∠3、∠4都是∠AOC的余角；

（3）∵∠1+∠DOF=90°，∠1=∠2，
∴∠2+∠DOF=90°，
∴∠DOC=∠2的余角是∠DOF；

（4）∵∠4+∠AOE=180°，∠3=∠4，
∴∠3+∠AOE=180°，
∴∠COF=∠3的补角是∠AOE．
故