The everyday objects recorded and collected by the successors to the first explorers may reveal ______.
A. where these objects came from
B. how they rotted in a tropical climate
C. a glimpse of the Incan civilization
D. the vicissitude of Amazon cultures
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According to the passage, the practice of installment ______.
A. was adopted by manufacturers
B. made consumer credit easier
C. promoted consumers' expectations
D. ultimately led to materialism
A．has been conceivedB．had been conceivedC．have been conceivedD．were conceived
A. has been conceived
B. had been conceived
C. have been conceived
D. were conceived
A．adaptB．have adaptedC．adoptD．have adopted
A. adapt
B. have adapted
C. adopt
D. have adopted
Whether we realize it or not(Para. 3), "it" refers ______.
A. weightlessness
B. the continuous and universal nature of gravity
C. the fact that our bodies never forget
D. the previous statements
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