单选题 11.The neighbors______you very much for you to speak in that way about them.
【正确答案】 C
【答案解析】must后面跟完成式表示说话者以肯定的语气推断过去发生的事情或在说话之前必定发生了某事,相当于“I’m sure sb did sth”或“I’m sure sb has done it”。