第一节 语法和词汇知识（共15小题；每小题1分，满分15分）
16. Many people are still in ______habit of writing silly things in______ public places.
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A. the; the
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B. \ ; \
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C. the; \
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D. \ ; the
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17. Either you or one of your students ______ to attend the meeting that is due tomorrow
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A. are
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B. is
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C. have
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D. be
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