单项选择题
A．Harmful thing. B．Insignificant thing. C．Troublesome thing D．Trivial thing
A．different people have different ideas about the telephone B．high income is the precondition for the use of telephone C．telephone is essential only to those people whose career depends on it D．working people need a telephone
A．he hates idle talk B．it always comes at an inopportune time C．it might carry some important message D．he doesn't want to be impolite to any one on the telephone