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
热点推荐：
公共英语等级考试PETS1-PETS5模拟试题汇总（680套）
备考有问题？加入公共英语考试群535346739 
有专业的老师提供备考指导，助你通关拿证，还可以和考友一起交流！
取证热点：
：2020年公共英语不用盲目备考，网校教研团队精心打造高通关套餐班，密训锁分，保障快捷通关!2020年公共英语锁分套餐班强势推出，精锐老师分题型专项辅导，听说读写稳步质变>>课程试听！
