根据下面资料，回答题
It is indeed the case that cheating on exam has been serious at school. Many students （51） that they have committed once or twice in the past or （52） least they have been tempted to cheat. In spite of the fact （53） school authorities have imposed a severe （54） on dishonest students, cheating on exams still frequently happens nowadays.
Two main factors （55） to this phenomenon. One major factor is out of fear. Many students are afraid that they may （56） in the exam if they depend on their own abilities. And a failure in an exam, to some （57）, is a failure in one' s personal advancement so they try fair and soul to pass the exam. The fact that some students want to seek fortune by luck in their academic study in-stead of by hard work can be another （58） No wonder so many students （59） to cheating on exams at the risk of being fined or dismissed from school.
How to deal with this problem? In my opinion, we have to reform our （60） educational system to make it a really effective tool to evaluate students. Meanwhile, we shall instill moral education into students' mind to arouse their awareness.
第（51）题答案选