This is probably going to be another one of those questions where there is no correct answer. I joined a few writing groups on Facebook & ran across someone asking for people to review her query. There were several places where she skipped using a contraction (she would instead of she'd or he had instead of he'd.) I pointed this out & she said, "I was told not use contractions in a query." To me, that sounded like another piece of random bad advice someone ran across on the internet but another poster agreed. I thought by not using the contractions, it looked unprofessional. I know when I'm typing out a story, I have a habit of not using them until I go back to edit. Any opinions?