英语三级B级

单选题Only after I had reached the airport ________ that I had forgotten to take my ticket with me.

参考答案:C进入在线模考
本题答案选C。句意:到机场后,我才发现忘记带飞机票了。本题考查倒装结构。当only置于句首时主句使用部分倒装结构,即将谓语部分的助动词置于主语之前。由从句中的过去完成时推知主句中应是过去时.因此C项正确。