Remember never to lie to others; if you did, you would have to ______ more lies to cover the lies you have______ .
December is the __________ month in year.
--- What is the date today? --- It's _________.
She knows a lot about China as she has been to China ________.
--- May I help you, sir? --- Yes, I bought the TV the day before yesterday, but it ______.
______ the bus until it ______..