Jack wasn’t saying anything，but the teacher smiled at him________he had done something very clever(2011·湖南，33)

help you, sir— Yes, I bought the TV the day beforeyesterday, but it ______.

I soon found that the work I was doing had already been done by someone else_______, I was wasting my time

ou come tothe museum by bike yesterday —- NoTwo meters of snow fell during the night As a result, several mainroads __

Where did you see your friend—It was in the super market ____ I was doing shopping.