As a creature, I eat; as a man, I read. Although one action is to meet the primary need of my body and the other is to satisfy the intellectual need of mind, they are in a way quite similar.
To begin with, you must work hard at your lessons and be fully prepared before the exam(主题句). Without sufficient preparation, you can hardly expect to answer all the questions correctly.
4)in the first place,in the second place,in the third place,lastly(不推荐，原因：俗)
5)to begin with,then,further more,finally(强烈推荐)
6)to start with,next,in addition,finally(强烈推荐)
7)first and foremost,besides,last but not least(强烈推荐)
8)most important of all,moreover,finally
9)on the one hand,on the other hand(适用于两点的情况)
10)for one thing,for another thing(适用于两点的情况)
建议：不仅仅在写作中注意，平时说话的时候也应该条理清楚!
四、短语优先原则
写作时，尤其是在考试时，如果使用短语，有两个好处：其一、用短语会使文章增加亮点，如果老师们看到你的文章太简单，看不到一个自己不认识的短语，必然会看你低一等。相反，如果发现亮点—精彩的短语，那么你的文章定会得高分了。其二、关键时刻思维短路，只有凑字数，怎么办?用短语是一个办法!比如：I cannot bear it.可以用短语表达：I cannot put up with it.I want it.
可以用短语表达：I am looking forward to it.这样字数明显增加，表达也更准确。