Correct the following sentences:

1.If the books have been cataloged last week, why haven’t they been placed on the shelf?
2.I really dug the character of Brutus.
3.The setting of a story effects the story’s plot.
4.Arctic trees are scrubbiest than trees in milder climates.
5.Quebec rises in a magnificent way above the St. Lawrence River.
6.During Colonial days, a school room looked rather empty.
7.The helium- filled balloon rose in the air.
8.If I had the address, I would have delivered the package myself.
9.Do you know that these gloves have lay on the bureau all week?
10.If I would have known about the team tryouts, I would have signed up for them.
11.Valarie claims that cats made the best pets.
12.By next month Ms. Jones will be Mayor of Tallahassee for two years.