An old friend from abroad, ______ I was expecting to stay with me, telephoned from the airport.
【正确答案】 C
【答案解析】解析：根据空白处前后内容可推知，缺少一个关系代词来引导非限定性定语从句，此关系代词指人，在从句中作宾语，只有whom合适；that不可引导非限定性定语从句。