8 13 完形填空:
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.
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
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