—Under no circumstances ________ the door to the Data Centre unlocked.
—I promise I'll be more careful in future.
A.you need to leave
B.should you leave
C.need you leave
D.you should leave
答案:B
答案:B 考查倒装句。句意为:——你无论如何都不能不锁数据中心的门就走了。——我答应你下次我会注意的。under no circumstance相当于in no case/in no way/on no account/by no means/never,意为“决不”,置于句首时,句子要部分倒装,即:将助动词或情态动词放在主语之前。若句中没有助动词或情态动词,则需添加助动词do,does或did,并将其置于主语前。由语境可知,此处有责怪的意思,情态动词应用should。故B项正确。