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

【正确答案】 A

【答案解析】本题考查倒装句。under no circumstances后面的句子需要用半倒装结构，首先排除掉选项 B和选项C。再根据have been told可知that后的宾语从句应用一般现在时，所以选项A符合题意。