单选题 We will be welcoming our keynote ______ at a reception to be given in the Emerald Room, which is located on the mezzanine, at 8:00 p.m.

【正确答案】 C
【答案解析】横线处需要填入与keynote搭配并充当welcome宾语的名词，故选(C)speaker。keynote speaker意为“主要发言人”。