Eddie is eight years old, but we have seven candles only, we need __________ candle.[ ]

You’d better take a sun umbrella to protect yourself ____ the sun shine. [ ]

Though the passage is easy, I don’t think __________can understand it.

Students need at least eight hours to sleep, or they are_______ in class.

Why didn’t you go to the party ?_______ an invitation, I would have gone to the party .