---Is Mary a _______ swimmer?---Yes, she swims _______.
How are you now? Go to see the doctor ____ you don’t feel well.
––Beijing is a big city, isn’t it?––Yes. In fact, it’s one of ____ cities in the world.
––Why are you late, dad? ––I met a friend and we ____ in the street for a while.
––Where’s your Mom, Xiao Hong? ––She ____ to music in her room.
On weekend, I usually go to bed late and get up at 10 ____ the morning.