在人类追求智慧的过程中,出现了各种各样的哲学派别,提出了各种不同的问题,但是从本质上看,他们的回答都是围绕( )问题展开
—How far can you run without stopping? —_________. I’ve never tried.
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.