在课后大家一定要及时做题才能更好的消化在课堂上学到的知识，因此希望必修一英语Unit5课后练习对大家查缺补漏有帮助，赶紧来练习吧！！

第一节 完形填空

阅读下面短文，掌握其大意，然后从各题所给的A、B、C和D项中，选出最佳选项。

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 satisfyin g and meaningful life.

【文章大意】　

我们行事往往最忌痴迷，但是对任何事都毫无热情、有梦想不去实践或者做事半途而废更不可取，因此适度的积极性迷恋是成事的关键。

1. A.scientific　　　 B.negative

C.various    D.psychological

解析：选B。根据下文“It can be unhealthy or dangerous.”可知，谈到痴迷，人们往往会想到极端行为的消极方面。

2. A.cause       B.cure

C.stage     D.company

解析：选B。根据“However”一词可知，作者认为能动性的痴迷是有积极作用的。再根据下文“...but also the recipe for a____3____life.”可知，“productive obsessing”是治疗厌倦和被动的良方。

3. A.balanced    B.simple

C.healthy      D.fulfilling

解析：D。根据最后一段“a satisfying and meaningful life”可知，这种“痴迷”也是让人过上有满足感的生活的诀窍。

4. A.order      B.invite

C.drive      D.ask

解析：选C。根据下文“...even if things get tough.”可知，为了能够有所成就而对某事产生的痴迷，即便事情会变得困难而棘手，它仍会让人觉得有动力，好像被驱动着去努力。

5. A.defeat     B.find

C.change      D.shape

解析：选A。相反，那些做事没有激情的人就很可能被挑战和困难所打败。

6. A.line     B.conflict

C.similarity     D.relationshi p

解析：选A。根据下文“So how do you __7__ a passion，and avoid the negative aspects of obsession?”可知，痴迷与激情还是不同的，它们中间有条细微而重要的分界线。

7. A.share     B.think

C.develop     D.exhibit

解析：选C。根据上文可知，作者认为对事物过分的痴迷是有害而危险的，但是做事如果没有热情也是不可取的，因此此处说的是：如何避免痴迷产生不良影响同时又能够激发热情?

8. A.stand for    B.bring up

C.make use of   D.be rooted in

解析：选D。根据下文“who have an unexplored interest in something ”可知，无论你想做什么，它都应当源于你对这件事的兴趣与热爱。

9. A.sticking    B.devoting

C.adapting     D.attaching

解析：选B。根据下文“When people do commit themselves on something...”可知，作者认为那些对某事怀有兴趣却一直推迟、不去实践的人应当花一个月时间致力去做这件事情。

10. A.keeps     B.means

C.begins    D.stops

解析：选D。根据上文“but always put it off”及下文“...hesitating and worrying and explores its own potential.”可知，当人们坚持了一段时间专心做某事之后，就会停止犹豫和担心而开始发掘自身的潜力。

11. A.forms      B.images

C.problems      D.states

解析：选D。根据下文...“these states”可知，此处指各种精神状态。

12. A.anxiety    B.envy

C.anger      D.regret

解析：选C。根据下文“...when you are offended.”可知，当人们被冒犯时会感到气愤。

13. A.successful      B.ambitious

C.painful        D.unreasonable

解析：选B。根据下文“...plan for years without putting it into practice is not productive.”可知，一个人有雄心壮志，如果不去实行就不会有任何结果。

14. A.enthusiasm     B.courage

C.creativity       D.determination

解析：选A。根据上文“In contrast，those without passion...”可知，此处说的是：怀着激情去做事不一定会使你变得不同凡响。

15. A.answer        B.limit

C.key        D.end

解析：选C。根据上文“‘productive obsessing’can be...the recipe for a ____3____life.”可知，怀着激情做事是让人过上美满而有意义的生活的关键。