2021年上半年公共英語四級完形填空練習(xí)題第七篇

編輯推薦：2021年上半年公共英語四級完形填空練習(xí)題匯總

2021年上半年公共英語四級完形填空練習(xí)題第七篇

Research on animal intelligence always makes me wonder just how smart humans are. ___1___ the fruit-fly experiments described in Carl Zimmer's piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly ___2___ to live shorter lives. This suggests that ___3___ bulbs burn longer, that there is an ___4___ in not being too terrifically bright.

Intelligence, it ___5___ out, is a high-priced option. It takes more upkeep, burns more fuel and is slow ___6___ the starting line because it depends on learning — a gradual ___7___ — instead of instinct. Plenty of other species are able to learn, and one of the things they've apparently learned is when to ___8___.

Is there an adaptive value to ___9___ intelligence? That's the question behind this new research. I like it. Instead of casting a wistful glance ___10___ at all the species we've left in the dust I.Q.-wise, it implicitly asks what the real ___11___ of our own intelligence might be. This is ___12___ the mind of every animal I've ever met.

Research on animal intelligence also makes me wonder what experiments animals would ___13___ on humans if they had the chance. Every cat with an owner, ___14___, is running a small-scale study in operant conditioning. We believe that ___15___ animals ran the labs, they would test us to ___16___ the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really ___17___, not merely how much of it there is. ___18___, they would hope to study a ___19___ question: Are humans actually aware of the world they live in? ___20___ the results are inconclusive.

1. [A] Suppose [B] Consider [C] Observe [D] Imagine

2. [A] tended [B] feared [C] happened [D] threatened

3. [A] thinner [B] stabler [C] lighter [D] dimmer

4. [A] tendency [B] advantage [C] inclination [D] priority

5. [A] insists on [B] sums up [C] turns out [D] puts forward

6. [A] off [B] behind [C] over [D] along

7. [A] incredible [B] spontaneous [C] inevitable [D] gradual

8. [A] fight [B] doubt [C] stop [D] think

9. [A] invisible [B] limited [C] indefinite [D] different

10. [A] upward [B] forward [C] afterward [D] backward

11. [A] features [B] influences [C] results [D] costs

12. [A] outside [B] on [C] by [D] across

13. [A] deliver [B] carry [C] perform [D] apply

14. [A] by chance [B] in contrast [C] as usual [D] for instance

15. [A] if [B] unless [C] as [D] lest

16. [A] moderate [B] overcome [C] determine [D] reach

17. [A] at [B] for [C] after [D] with

18. [A] Above all [B] After all [C] However [D] Otherwise

19. [A] fundamental [B] comprehensive [C] equivalent [D] hostile

20. [A] By accident [B] In time [C] So far [D] Better still

答案 1. B 2. A 3. D 4. B 5. C

6. A 7. D 8. C 9. B 10. D

11. D 12. B 13. C 14. D 15. A

16. C 17. B 18. A 19. A 20. C

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