第二节 语法填空（共10小题，每小题1.5分，满分15分）   
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的
词或使用括号中词语的正确形式填空，并将答案填写在答题卡标号为31—40的相应位置上。
Opportunities don't come often. They come every once in a while. Very often,they come quietly and go by without 31   (notice). Therefore, it is advisable 32   you should value and treat them with care.When an opportunity comes, it brings a promise but never realizes it  33  its own.If you want to achieve something 34   intend to fulfill one of your ambitions,you must work hard, make efforts and get prepared. 35  , you will take no advantage of opportunities when they come to visit you. The difference between a man who succeeds and 36who does not lies only in the way each treats opportunlties. The successful person always makes adequate   37 (prepare) to meet opportunities as they duly arrive. The unsuccessful person, on the other hand, works little and just waits to see them pass by. In my opinion, there 38plenty of opportunities for everyone in our society, but only those 39 are prepared adequately and qualified highly can make use of them to achieve 40 purpose.