6. The form and physiology of leaves vary according to the ______ in which they develop: for example, leaves display a wide range of adaptations to different degrees of light and moisture.

　　A relationship

　　B species

　　C sequence

　　D patterns

　　E environment

　　7. Because no comprehensive ______ exist regarding personal reading practices, we do not know, for example, the greatest number of books read in an individual lifetime.

　　A records

　　B instincts

　　C remedies

　　D proposals

　　E commercials

　　8. Many artists believe that successful imitation, far from being symptomatic of a lack of ______, is the first step in learning to be creative.

　　A elegance

　　B resolution

　　C goodness

　　D originality

　　E sympathy

　　9. We first became aware that her support for the new program was less than ______ when she declined to make a speech in its favor.

　　A qualified

　　B haphazard

　　C fleeting

　　D unwarranted

　　E wholehearted

　　10. Both television commercials and programs present ______ view of the material world, one which promotes a standard of living that most of us can probably not attain.

　　A symptomatic

　　B delineated

　　C integrated

　　D conspicuous

　　E distinctive