He knows ___________ about computers
Children _______ sit in the front seat of a car. It’s too dangerous.
In Chongqing, you can often see many people dance outside together if it ______ in the evening.
Mr. Green’s office is _______ the 26th floor. You can take the lift there.
—Could I use your bike? Mine is broken.—Certainly.But please______it back soon.I need it this afternoon.
—Where is your father?--He ________ the World Cup in the living room.