— They are said to have been familiar with each other.— But they_________. They were introduced only hours ago.
—Shall we stop for lunch _____ shall we drive on?—Let’s stop for lunch, but the driver can’t drink _____ drive.
In his apartment there are two rooms, _____ is used as a living room.
_______ with any common sense can tell the difference between the two.
It is really _______ useful dictionary and _______ dictionary every one of us needs.
—It is ridiculous (荒唐的) that so many people believe the world will disappear in 2012.—__________ it is true?