Doctors warned against chewing tobacco ______ (作为吸烟的替代品).as a substitute for smo

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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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