There are both advantages and disadvantages of a policy that requires students to participate in community service activities. One of the advantages is that it might help students understand the importance of good will and charity. Another advantage is that it will help students understand other people better. The most important advantage of such a policy is that it will help bridge gaps between different age， class， and ethnic groups. Some people might also argue that there are some drawbacks to having such a policy. One of those disadvantages might be that forcing people to do things they don‘t want to do usually has some kind of consequence. Furthermore， when people are receiving help from others， they usually give their trust to their helpers; if the volunteers don‘t want to be there， it might prevent some people from helping.
分析：总体来看，内容完整，条理清楚，很自然的就能从回答中获得所需要的信息。先说出了问题的优势，再指出劣势。而且关系一层层的递进，例如：One of the advantages， Another advantage， The most important advantage. 这样读下来，可以轻松的知道优势在哪。 同样，在说劣势的时候，也采用了这种形式：One of those disadvantages， Furthermore. 论证的时候能通过举例，细节描述去证实观点： Furthermore， when people are receiving help from others， they usually give their trust to their helpers; if the volunteers don‘t want to be there， it might prevent some people from helping. 这样是内容更加丰满了。在提出一个观点的时候，一般来说至少要用2个以上的论据去支撑自己的论点，否则就会显得太单薄，缺乏感染力和说服力，也会造成让人觉得口语水平不高等这样的弊端。所以一定要用细节来充实内容。