单项选择题
It was considered impolite by many to discuss business on social （）
A．events B．moments C．occasions D．affairs
单项选择题 Jenny: Well, it is time for boarding. Robert: （）.
单项选择题 Speaker A: Would you like to go with me for a movie tonight Speaker B: （）.
单项选择题 Yvonne: You have a nice big room. Frank: （）.
