At the beginning of this century, medical scientists made an interesting discovery; we are built not just of flesh and blood but also of time. They were        to show that we all have “a body clock”         us, which controls the        and fall of our body energies,        us different from one day to the next.

The        of “a body clock” should not be too        since the lives of most living things are controlled        the 24 hour night-and-day cycle. We feel        and fall asleep at night and become        and energetic during the day. If the 24 hour-cycle is        , most people experience unpleasant        . For example, people who are not        to working at night can find that        of sleep causes them to        badly at work.

       the daily cycle of sleeping and       , we also have other cycles which       longer than one day. Most of us would        that we feel good on some days and not so good on         ; sometimes our ideas seem to flow and at other times, they        do not exist.

1.A．a(chǎn)nxious    B．a(chǎn)ble    C．careful               D．proud

2.A．inside       B．a(chǎn)round        C．between           D．on

3.A．movement        B．supply          C．use                D．rise

4.A．showing   B．treating       C．making               D．changing

5.A．invention B．opinion        C．story             D．idea

6.A．difficult    B．exciting       C．surprising          D．interesting

7.A．from         B．by        C．over         D．during

8.A．dull         B．tired C．dreamy        D．peaceful

9.A．regular     B．excited        C．lively        D．clear

10.A．disturbed       B．shortened   C．reset        D．troubled

11.A．moments        B．feelings       C．senses              D．effects

12.A．prevented      B．a(chǎn)llowed       C．expected    D．used

13.A．miss       B．none   C．lack          D．need

14.A．perform          B．show   C．manage            D．control

15.A．With       B．As well as    C．Except              D．Rather than

16.A．working         B．moving        C．living        D．waking

17.A．repeat   B．remain         C．last           D．happen

18.A．a(chǎn)gree     B．believe        C．realize              D．a(chǎn)llow

19.A．other     B．the other    C．a(chǎn)ll other           D．others

20.A．just         B．only    C．still           D．yet

 

【答案】

 

1.B

2.A

3.D

4.C

5.D

6.C

7.B

8.B

9.C

10.A

11.B

12.D

13.C

14.A

15.B

16.D

17.C

18.A

19.D

20.A

【解析】試題分析：文章大意：本世紀初，科學家們就已經(jīng)發(fā)現(xiàn)人體不僅有血肉組成，還有時間。因此，根據(jù)這個發(fā)現(xiàn)，他們能夠證明在人體內(nèi)存在生物鐘。

1.B 形容詞辨析。根據(jù)這個發(fā)現(xiàn)，他們能夠證明在人體內(nèi)存在生物鐘。be anxious to do渴望做某事，此處沒有強調(diào)科學家的心理活動，故排除。be able to do 能夠干某事，所以答案選B。

2.A 詞義辨析。根據(jù)常識及文中第一句we’re built not just of flesh and blood but also of time.可知生物鐘是在我們的體內(nèi)（inside）所以答案選A。

3.D 名詞辨析�？崭裆纤痹~應與and后面的fall 構(gòu)成互補關(guān)系，即用rise與fall相對，表示起伏。A.運動；B供應； C.使用 D.升起，根據(jù)句意生物鐘能控制我們體內(nèi)能量的起伏，選擇D。

4.C 動詞辨析。結(jié)合前一句話中的controls可知，生物鐘能使我們每天的表現(xiàn)不一樣。show 證明，展示，指示；treat對待；change使改變。make+賓語+賓補 使……怎么樣。如選change就意為使我們發(fā)生變化,與上下文意思不符。所以答案選C。

5.D 名詞辨析�！吧镧姟敝皇强茖W家經(jīng)過研究而得出的一種結(jié)論或觀點。所以選擇D idea。opinion表示個人的看法。

6.C 形容詞辨析。根據(jù)空格后面的原因狀語從句“因為大部分生物的生命都受一天24小時循環(huán)的控制。”可知“生物鐘”這種觀點并不令人驚奇（surprising），所以答案選C。其他選項A 困難的 B興奮的  D有趣的

7.B 介詞辨析。前面用的是……are controlled 被動形式，只能與by連用。句意：大部分有生命的動物都受到日夜輪回這個時間循環(huán)的控制。

8.B 形容詞辨析。結(jié)合常識可知，人工作一天，到晚上應是比較勞累tired。另外，后面的fall asleep 應是由勞累引起的。dreamy多夢的，不應出現(xiàn)在fall asleep之前。

9.C 形容詞辨析。人休息了一晚上，第二天又充滿了生機lovely、和活力energetic。

10.A動詞辨析。如果時間循環(huán)被打亂disturbed，大部分人就會不舒服。A. 打攪 B縮短 C重新設(shè)置 D 惹麻煩，所以答案選擇A。

11.B 名詞辨析。結(jié)合下一句的例子可知，此處應為人感到不舒服或者說有不愉快的感覺unpleasant feelings。A時候，時刻 B感覺；感情 C感官，意識 D 效果，影響

12.D 考查動詞辨析。be used to doing something習慣于……。不習慣于在晚上工作的人如果晚上工作，工作就會做不好。其它選項不與doing連用，而是用to do動詞不定式。

13.C 詞意辨析。lack此處為名詞，在從句中做主語，lack of sleep缺乏睡眠。B none of 一點沒有；D need of 需要，

14.A 名詞辨析。缺乏睡眠導致第二天工作表現(xiàn)不好。A perform工作；表現(xiàn) B 表演；顯示 C經(jīng)營；管理 D 掌握；控制

15.B 詞意辨析。根據(jù)后面的also可得知對應的“和……一樣”用as well as答案。

16.D 動詞辨析。人類的日夜循環(huán)分為兩段時間：即睡眠時sleeping的時間和醒著的時間waking。

17.C 動詞辨析。根據(jù)后面的longer than one day 可知，此處last“持續(xù)”。A 重復 B仍然 D發(fā)生；碰巧

18.A 動詞辨析。大部分人都有這種體驗，都同意（agree）這種看法。

19.D 代詞辨析。上文提到了some days與之相對應的是other days即others。

20.A 副詞辨析。此處just用于否定句中表強調(diào),它們根本就不存在。

考點：考查科普性說明文

 

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44．A．steadily                    B．unexpectedly          C．slowly                       D．hurriedly

45．A．replied                      B．shook                        C．thought                  D．doubted

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50．A．fixed                          B．concerned               C．filled                          D．came

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