Thank you so much! But for your text message, I home without my ID card this morning.
A. would have left
B. would leave
C. had left
D. left
网友回答
(答案→)A. would have left
B. would leave
C. had left
D. left
解析：考查虚拟语气。根据句意可知该句是对过去的虚拟，要选用would/could/might have done结构，but for 要不是
句意为非常感谢你，要不是你的短信，我今天早上就会不带身份证出门了。