---what's made George so upset---___the key to his carA losing B lost为什么不选B呢?已经是过去的事了呀

---what's made George so upset---___the key to his carA losing B lost为什么不选B呢?已经是过去的事了呀
---what's made George so upset
---___the key to his car
A losing B lost
为什么不选B呢?已经是过去的事了呀

---what's made George so upset---___the key to his carA losing B lost为什么不选B呢?已经是过去的事了呀
比如说钥匙是从口袋里调到地上的,按照你的意思选lost的话就是说“丢失”这个一瞬间的动作一直持续到现在,钥匙从口袋里出来一直悬在空中,没碰到地.
而losing是指还没有找到的意思.
而且现在是用在句首,the lost key 倒是可以用的.