One of the requirements for a fire is that the material ____ to its burning temperature.

If I hadn’t stood under the ladder to catch you when you fell, you _________ now.

—She joined a football team last fall and was recently made captain.  —Never _____ she'd ever have that much energy.

— Linda hasn’t shown up yet.— It’s strange. She ____.

----Mary broke up with me!----You ______ have forgotten about the Valentine's Day．