—Do you know sound travels very fast? 一Yes. But light travels _________ sound.
-- ____ is the letter from? --From my aunt in London.
—Does Liu Li have a pen? -- ____ . But he has a pencil.
Look at ____ photo. It’s ____ photo of my family.
---Would you mind taking the underground to the theatre tonight? --- .it will take less time than driving a car.
--- I wonder if I park my car here. --- Of course it does. You need to find a safer place.