I won’t forget my teacher because she ________so kind to me since I came to this school

We congratulated him ______ his getting a gold medal.That is to say: we offered him our congratulations ______ his getting a gold medal.

Not until then ________ how important the brakes were.

Hi, Nancy, I didn’t know you had come backSo have you graduated from college?—- YesI _____ French for 5 years in Nanjing

I’ll be able to come to see your performance at : tomorrow evening.—I’m sorry, by then my performance____ and I___ reporters in the meeting room