专升本英语阅读理解练习题及答案解析

　　If someone is sleepwalking, they are walking around while they are asleep. Sleepwalking happens when a person is not fully asleep but not quite awake either. Usually we move from our deepest level of sleep to a lighter level and stay there. Sleepwalkers come right up to waking levels but do not fully awaken. It is at this time that they get up and walk.

　　The longer a person stays in deep sleep, the more time it takes for the sleep to be broken. That opens up the possibility of being awakened (but not fully) and of sleepwalking.

　　Sleepwalking happens more often among young people than grown-ups because young people usually have more deep sleep. Up to 7% of 5- to 12-year-olds sleepwalk, while only about 2% of grown-ups sleepwalk. We get less deep sleep as we are getting older and the possibility of sleepwalking is also reduced.

　　Sleepwalking may run in families, too. If one of your parents is a sleepwalker, you have about a 50% possibility of also being a sleepwalker.

　　问题：

　　1. This passage is about _____.

　　A.why sleepwalking happens

　　B.where sleepwalkers go

　　C.what sleepwalkers do

　　D.when sleepwalkers walk

　　【参考答案】A

　　[考点]主旨大意题

　　【精析】A 通读全文可知，文章主要介绍了梦游症发生的条件、多发人群和遗传概率等，A项最符合题意。故选A。

　　2.Who have more possibility of sleepwalking?

　　A.Grown-ups. B.Young people. C.Old men. D.Old women.

　　【参考答案】B

　　[考点]事实细节题

　　【精析】B 根据第三段第一句"Sleepwalking happens more often among young people than grown-ups

　　3.What does "reduced" mean in "

　　A.Opened up.

　　B.Cut down.

　　C.Kept on.

　　D.Sped up.

　　【参考答案】B

　　[考点]词语理解题

　　【精析】 B open up：打开;cut down：减少;keep on：继续;speed up:加速。根据第三段最后一句中的also可知，reduced应与前面的get less(变少)意思相近，意为"减少"，B项与其意思最为接近。故选B。

　　4. People have more possibility of developing sleepwalking _____.

　　A.when they get older

　　B.when they become parents themselves

　　C.if their parents sleepwalk

　　D.if they don't sleep well

　　【参考答案】C

　　[考点]事实细节题

　　【精析】C 根据最后一段最后一句"If one of your parents is a sleepwalker, you have about a 50% possibility…"可知，如果你的父母中有一方是梦游症患者，那么你患梦游症的概率大约为50%，即比正常人更有可能患梦游症，所以选项C正确。根据第三段最后一句"…we are getting older and the possibility of sleepwalking is also reduced."可知，选项A错误;B、D两项并未在文中提及。故选C。

　　5.This passage may be from _____.

　　A.a storybook B.a travel book C.a science book D.a cookbook

　　【参考答案】C

　　[考点]推理判断题

　　【精析】 C a storybook:一本故事书;a travel book:一本旅游书;a science book:一本科普书;a cookbook:一本烹饪书。本文主要介绍了"梦游症"这一生理现象，属于科学范畴，且用语严谨客观。由此可推知，本文可能选自一本科普书。故选C。