单项选择题
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
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．It provides a means for all kinds of talks whereas the speakers needn't come person to person with each other. B．It can send a message of sudden emergency conveniently. C．It is densely-installed in England. D．It is impossible to ignore the telephone when it rings.