单选题 We are happy to announce that all employees will be receiving a bonus this month, as we have had no ______ at all for 6 weeks.

【正确答案】 D
【答案解析】横线处所填单词充当had的宾语，因此应填入名词。句意应为“连续6周没有任何投诉”，故选(D)complaints。