How to Write a Complaint Letter to Restaurant Manager on Bad Service
苦情の手紙
Making Complaints
ホテルでの会話: 苦情を言う
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苦情の手紙を書く方法 (そして実際に結果を得る)
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不十分なレストランサービスに対する苦情の手紙を書くにはどうすればよいですか?
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ホテルでゲストの苦情に対処する方法|•フロントオフィス
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