He is one of the world-famous musicians. By the time he was six, he ______ composing.
A serious study of physics is impossible ________ some knowledge of mathematics.
—I’m afraid you have the wrong number. —Sorry! ________.
________ you said at the meeting describes a bright future for the company.
It remains to be seen ________ the newly formed committee’s policy can be put into practice.
_________ breaks the rules should be punished and fined at least 200 yuan.