填空题

A——greeting people B——identifying yourself
C——introducing others D——ending a conversation
E——saying goodbye F——asking for information
G——getting more information H——preventing interrupting
I——avoiding answering J——delaying and hesitating
K——checking understanding L——accepting invitation
M——rejecting invitation N——offering help
O——asking permission P——making suggestions
Q——making apologies R——expressing gratitude
( )谢绝邀请 ( )防止插话