● Unit 1 打招呼
● Unit 2 感谢及祝贺
● Unit 3 疑问及回答
● Unit 4 情感表达
● Unit 5 托付及劝诱
● Unit 6 日常表现 gsOdp/xPuBBcCHr8HRfgE5sF0kj6kRzYR+kYWTRPHKkis96su9etT5K16tOWdQpQ
