out of politeness(出于礼貌)是伊丽莎白向Nigel打招呼时的态度和口气，其他3个选择都与课文的实际情况不符。
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People often ask about health out of politeness.
人们常常出于礼貌问候健康。
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Joe hated the meal but choked it down out of politeness.
乔不喜欢这顿饭菜，但出于礼貌还是把它硬咽下去。
Perhaps as a typical man, I had never looked at a baby before, except out of politeness.
或许我是一个典型的男人，所以原来从没认真看过小孩，要看也是出自礼貌。
Out of politeness, I've accepted Facebook friend requests from any family members who have sent them.
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Out of politeness, they told me it was OK to not remove my shoes as I walked in to their rooms.
CNN: Syrian refugees in Lebanon facing bitter winter
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