根据首字母和汉语提示完成单词。 1. When you are in public, you m______ talk too loudly? 2. People usually shake h______ with others when they meet for the first time? 3. It's ______ (礼貌的) to wait for everyone to put some food on their plates? 4. The man and the woman can't see each other the night before the ______ (婚礼)? 5. Joan and Chris got m______ last year.How happy they are!