14. There was ______ time when everything to do with ______ nature could keep Anne spellbound.
A. a; the
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B. the; a
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C. a; \
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D. the; the
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15. I insist that you ________your teacher for some guidance when in trouble.
A. lead to
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B. turn to
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C. belong to
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D. add to
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16. Autumn coming, the leaves have________turned into brown color.
A. frequently
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B. gradually
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B. exactly
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D. regularly
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17. He was very rude to the professor, ______, of course, made things even worse.
A. who
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B. that
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C. what
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D. which
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