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3、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 determine the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really for , not merely how much of it there is. Above all , they would hope to study a fundamental question: Are humans actually aware of the world they live in? So far 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
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2、
Ancient Greek philosopher Aristotle viewed laughter as “a bodily exercise precious to health.” But _ _ 1 _ _ _ some claims to the contrary, laughing probably has little influence on physical fitness Laughter does _ _ 2 _ _ _ short-term changes in the function of the heart and its blood vessels, _ _ _ 3 _ heart rate and oxygen consumption But because hard laughter is difficult to _ _ 4 _ _ , a good laugh is unlikely to have _ _ 5 _ _ _ benefits the way, say, walking or jogging does.
_ _ 6 _ _ , instead of straining muscles to build them, as exercise does, laughter apparently accomplishes the _ _ 7 _ _ , studies dating back to the 1930’s indicate that laughter _ _ 8 _ _ _ muscles, decreasing muscle tone for up to 45 minutes after the laugh dies down.
Such bodily reaction might conceivably help _ 9 _ _ the effects of psychological stress. Anyway, the act of laughing probably does produce other types of _ _ _ 10 _ _ _ feedback, that improve an individual’s emotional state. _ _ 11 _ _ _ _ one classical theory of emotion, our feelings are partially rooted _ _ _ _ 12 _ _ _ physical reactions. It was argued at the end of the 19th century that humans do not cry _ _ _ 13 _ _ _ they are sad but they become sad when the tears begin to flow.
Although sadness also _ _ _ _ 14 _ _ _ tears, evidence suggests that emotions can flow _ _ 15 _ _ _ muscular responses. In an experiment published in 1988,social psychologist Fritz Strack of the University of würzburg in Germany asked volunteers to pick a pen either with their teeth-thereby creating an artificial smile – or with their lips, which would produce a(n) disappointed expression. Those forced to exercise their smiling muscles reacted more exuberantly to funny cartons than did those whose mouths were contracted in a frown, mentioning that expressions may influence emotions rather than just the other way around Similarly , the physical act of laughter could improve mood.
1．[A]among [B]except [C]despite [D]like
2．[A]reflect [B]demand [C]indicate [D]produce
3．[A]stabilizing [B]boosting [C]impairing [D]determining
4．[A]transmit [B]sustain [C]evaluate [D]observe
5．[A]measurable [B]manageable [C]affordable [D]renewable
6．[A]In turn [B]In fact [C]In addition [D]In brief
7．[A]opposite [B]impossible [C]average [D]expected
8．[A]hardens [B]weakens [C]tightens [D]relaxes
9．[A]aggravate [B]generate [C]moderate [D]enhance
10．[A]physical [B]mental [C]subconscious [D]internal
11．[A]Except for [B]According to [C]Due to [D]As for
12．[A]with [B]on [C]in [D]at
13．[A]unless [B]until [C]if [D]because
14．[A]exhausts [B]follows [C]precedes [D]suppresses
15．[A]into [B]from [C]towards [D]beyond
