1. 阅读下面短文，掌握大意，然后从各题所给的四个选项（A、B、C和D）中，选出最佳答案。

    Is your mind completely filled with thoughts of something? That's called obsession (痴迷). When we think of obsession, we tend to think of the 1 aspects of extreme behavior. It can be unhealthy or dangerous. However, actually, “productive obsessing” can be not only a 2  for boredom and passivity, but also the recipe for a 3 life. Having a productive obsession appears to 4 people to do this, even if things get tough. In contrast, those without passion (激情)may end up letting challenges and difficulties 5 them.  

    But there is a fine but important  6 between obsession and passion. So how do you 7 a passion, and avoid the negative aspects of obsession?

    Whatever the project is, it should 8 love and interest. People, who have an unexplored interest in something, but always put it off, should begin by 9 themselves to it for a month. When people do commit themselves on something, even for a month, their brains become retrained. It 10 hesitating and worrying and explores its own potential.

    Having a productive obsession leads to various mental 11: pleasure when things are going very well; 12 when you are offended. The key is being prepared for these states and knowing how to handle them. Being obsessed with a(n) 13 plan for years without putting it into practice is not productive.

    Going after something with 14 may not make you outstanding, but you don't know where it will lead until you give it a try. At the very least, it could be the 15 to a satisfying and meaningful life。