5．What do you think of different kinds of reference books（参考书）？We did a survey．Here're some of their answers．
Wang Qian
Reference books have some disadvantages．Some reference books show answers to the exercises in textbooks．This isn't very good．Students will just copy the answers directly instead of thinking for themselves．Day after day，students won't listen carefully in class．
Zheng Xia
Sometimes，reference books are useful．Some reference books show something a little bit more difficult than the textbooks．They challenge us and let us reach a higher level in our studies．So if you want to learn more，reference books are needed．
Liu Wei
I don't think reference books are very helpful．If we listen to our teachers carefully and solve the problems at school，this is enough to grasp （掌握）all the knowledge．Besides，the school has already gives us a lot of homework．More reference books will only make us sick of studying．And for some subjects like English，if you want to learn well，the best way is to speak，not just to do exercises．
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Wang Qian
Reference books have some disadvantages．Some reference books show answers to the exercises in textbooks．This isn't very good．Students will just copy the answers directly instead of thinking for themselves．Day after day，students won't listen carefully in class．
Zheng Xia
Sometimes，reference books are useful．Some reference books show something a little bit more difficult than the textbooks．They challenge us and let us reach a higher level in our studies．So if you want to learn more，reference books are needed．
Liu Wei
I don't think reference books are very helpful．If we listen to our teachers carefully and solve the problems at school，this is enough to grasp （掌握）all the knowledge．Besides，the school has already gives us a lot of homework．More reference books will only make us sick of studying．And for some subjects like English，if you want to learn well，the best way is to speak，not just to do exercises．
| For your reference books | ||
| （81）Advantages | Liu Yang | In some ways，they are useful because they （82）help us understand textbooks better． |
| Zheng Xia | Reference books can help us learn more and challenge us to （83）（let us ） reach a higher level in our studies． | |
| Disadvantages | Wang Qian | Students won't think or （84）listen （carefully） in class because they can copy the answers from the reference books． |
| Liu Wei | More reference books aren't very helpful．They will only （85）make us sick of studying | |
86．According to School Policy，visitors have toC when entering the school．
根据对话内容，在空白处填写适当的话语（话语可以是一个句子，一个短语或一个词），使对话完整．