2. 外语
  3. Doctors warned against chewing tobacco ______ (作为吸烟的替代品).

Doctors warned against chewing tobacco ______ (作为吸烟的替代品).

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问题 Doctors warned against chewing tobacco ______ (作为吸烟的替代品).
选项
答案as a substitute for smoking
解析 本题考查名词“替代品”与介词的固定搭配，substitute应该与介词for呼应。
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大学英语四级

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