17．It isimpolite （polite） to ask other's income，marriage and age．

分析 詢問他人的收入、婚姻及年齡是不禮貌的．

解答 答案：impolite
解析：根據(jù)后面的"詢問他人的收入、婚姻及年齡"可知，做這些事情是"不禮貌的"；所給詞polite意為"禮貌的"，故應(yīng)該使用其反義詞impolite"不禮貌的"一詞．

點評 本題考查單詞填空，做此類題目時一定要仔細分析句子結(jié)構(gòu)，確定所缺成分；再結(jié)合所給的中英文提示及題干中其他要求填入正確單詞．

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