Tiếng Anh Lớp 10: If I had worked harder, I would have passed the exam. A.  I passed the exam because I worked harder than others. B.  I failed the e

Tiếng Anh Lớp 10: If I had worked harder, I would have passed the exam. A.  I passed the exam because I worked harder than others. B.  I failed the exam, so I will have to work harder. C.  As I did not work hard enough, I did not pass the exam. D.  Although I worked very hard, I did not pass the exam., giúp em giải bài này ạ, em cảm ơn thầy cô và các bạn nhiều.