8. A good night's sleep is believed to help slow the stomach's emptying, produce a smoother, less abrupt absorption of sugar, and will better ______ brain metabolism.
9. During the trip itself, they will be ______ to high doses of radiation, raising their odds of getting cancer later in life, and they will lose bone density.
A.sympathetic
B.ascribed
C.preferable
D.subjected
A B C D
D
[解析] 在旅途中,他们将会遭受到高剂量辐射,导致未来患癌几率的增加,而且他们还将会流失骨质密度。 四个选项均可与介词to搭配使用,与之搭配之后。选项A“be sympathetic to sth.”意思是“赞同,支持”;选项B“be ascribed to sth.”意思是“被归因于”;选项C“be preferable to sth.”意思是“更好”;选项D“be subjected to sth.”意思是“受到,遭受,经受”。综合比较各选项意思,只有D选项符合句意,故选D。
10. If you want this painkiller, you'll have to ask the doctor for a ______.
3. We believe—mistakenly, all too often—that the knowledge or insight we will gain from the past will give us what we need to change our behaviors, thoughts and feelings today.
Part Ⅱ Cloze Sleep is divided into periods of so-called REM sleep, characterized by rapid eye movements and dreaming, and longer periods of non-REM sleep. 1 kind of sleep is at all well-understood, but REM sleep is 2 to serve some restorative function of the brain. The purpose of non-REM sleep is even more 3 . The new experiments, such as those 4 for the first time at a recent meeting of the Society for Sleep Research in Minneapolis, suggest fascinating explanations 5 of non-REM sleep. For example, it has long been known that total sleep 6 is 100 percent fatal to rats, yet, 7 examination of the dead bodies, the animals look completely normal. A researcher has now 8 the mystery of why the animals die. The rats 9 bacterial infections of the blood, 10 their immune systems—the self-protecting mechanism against disease—had crashed.
1.
A.Either
B.Neither
C.Each
D.Any
A B C D
B
[考点] 本题考查上下文理解。 [解析] 本文介绍了研究者对睡眠的研究,简单说明了睡眠的种类,及睡眠缺乏的危害及其原因。 文章开始就提到睡眠分为两类:REM睡眠和非REM睡眠。通过句中的not at all可以推断,此处应含有否定的意思,意为我们对于这两种睡眠并不是非常了解,故选B。 [参考译文] 睡眠分为所谓REM睡眠的周期,其特征在于眼球快速运动和做梦,而非REM睡眠周期的时间较长。无论是哪种睡眠都不易于理解。但REM睡眠被假设是对大脑的某些功能有恢复作用的。非REM睡眠的目的是更加神秘的。一项新的实验,例如最近在一个明尼阿波利斯睡眠研究协会的会议中首次描述,建议对非REM睡眠的惊人作用进行解释。 例如,我们早已知道对于老鼠,睡眠100%的剥夺是致命的。然而,经尸体检验,这样死去的动物看上去完全正常。一位研究人员已经让这些动物死亡原因的秘密真相大白了。老鼠罹患血液细菌感染,就像他们的免疫系统——自我防病机制——被摧毁了一样。
2.
A.intended
B.required
C.assumed
D.inferred
A B C D
C
[考点] 本题考查动词词义辨析。 [解析] 根据上下文推断,上句说无论是哪种睡眠都不易于理解,所以此处说REM睡眠具有有助于大脑恢复功能的说法应该不是肯定的,而是猜测的。人们主观上认为它具备这功能,虽然D选项infer意为“根据事实的推测、推断”,但其后一般接从句。而assume sth. /sb. to do符合题意,故选C。