A number of people consider it bad _________ to smoke in rail station’s waiting area.
Both of the two rulers are broken. I want to buy a _______ one.
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 ______.