Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
Too much drinking will do________to your health;you should take the doctor’s advice.
—How long have you________? —It is about ten years since we________.
Tom is ___________ that he can’t go to school.
With the development of science and technology,there is no doubt_____Chinese astronauts will land on the moon in the near future.
—David,could I use your car? —Sorry,there is something wrong with it.I will have it________this afternoon.