题目内容

Which of the following is closest in meaning to "clogging up" (Para. 4)?

A. corrupting.
B. obstructing.
C. raining.
D. betraying.

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By saying "... having subordinated the earth to man" (Para. 2), the author implies that science and technology _____.

A. have enslaved human beings
B. have led to the ruin of civilization
C. have freed human beings from ignorance
D. have helped human beings to conquer the Nature

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We know from Paragraph 4 that lairs are prone to _____.

A. speak in great details
B. blink more rapidly
C. avoid eye contact
D. blink less frequently

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