—The charity walk begins _______ 9.00 a.m. Don’t be late. —No problem.
--- Can you hear a girl ______ in the room?--- Yes. let’s go to see her.
Of the two cities. I think Chongqing is ______ one.
--- Is Mr black really ill?---_________. He’s in hospital.
The post office is about 1 kilometer __________.
________ he is a child, ______ he knows much about the computer.