Question

【题目】在法国就餐时吸烟是不礼貌的。
It's impolite during a meal in France.

Answer 1

【答案】to；smoke
【解析】句型：It's+形容词+for sb+to do sth，空格对应的是“吸烟”smoke，根据句型可知填动词不定式，所以答案是to smoke。