Alot of traffic was kept from going into the city centre theheavy snow

rks, ________ of gun powder or flashpowder _______ in a tight paper tube, make the big flash or boom effect

Where did you pick up the news？——It was in the supermarket _____we shopped serval days.

It was wrong of you to fromall your friends who helped you when you were in trouble．

She is such a woman who is always __________ fault with the way others do things.