单选题 We have been told that under no circumstances we can use the telephone in the office for personal affairs.

【正确答案】 B
【答案解析】[解析] under no circumstances放在句首,句子要倒装。由此排除选项C和选项D。再根据主句时态(现在完成时)以及题干的内容可知,此题不能用一般过去时,因此B为答案。