-When you were hired, how long did you spend completing these paperwork?

-It took over an hour, because I read all contracts thoroughly and then filled out all of them.

Excellent work, Mrs. Kim. The first sentence is outstanding; however, I have enhanced the basic vocabulary to a more sophisticated level. The second sentence is also accurate, but there is a minor mistake with the phrase "over and one hour," where you should include the article "an," making it "over an hour." Overall, your efforts are commendable. Prepare for lesson number two and have a marvelous day! ^^