This colour TV is very expensive, but not_______.
It was in the university ten years ago, _________ they met in September for the first time, _________ they fell in love with each other.
Professor Smith, along with his assistant, ________on the project day and night to meet the deadline.
Some researchers believe that there is no doubt ______a cure for AIDS will be found.
If you go by _________train, you can have quite a comfortable journey, but make sure that you get_fast one.
—I would like to pick up your sister for you. But I don’t know her. _____?—A middle-aged woman with a round face, wearing a red blouse.