单选题 I"ll go to the airport tomorrow morning to ______ a good friend who leaves for Australia.
【正确答案】 A
【答案解析】[解析] 各选项的意思是：see off为……送行；send off发送，邮寄；turn off关掉，断开，拐弯；say departure说离开。根据句意可知，答案是A。