— Why _____ these cards ______ orange?— Because orange can cheer you up.

---Why not go to see the movie with Lydia?---Because I ______ it.

—David, are you listening to me?—Sorry, Dad. I ________ to make sense of what the reporter said.

－ How long _______ home?－For about three months.

If our government        attention to controlling food safety now, our health ________ in danger.