---Shall we stop for lunch _________ shall we drive on?---Let’s stop for lunch, but the driver can’t drink _________ drive.
The girl is often heard _______ in the next room.
About 500 cars ________in the factory last month.
Lucy speaks Chinese ________ Lily.
Try to buy one before all the tickets ________.
—_______have you visited Nanjing? —Three times.