We had a wonderful performance in the annual school sports meeting. Not only ___ in the coming relay race, but also we were the runner-up of the tug-of-war.

下列各句中，表达得体的一句是（ ）

The charity sale our school organizes every year has taught us much _______ we would never have learned it in class

You _____ such a serious mistake if you had followed his advice.

____________________—— I am a doctor.