单项选择题
A．Doctor and patient. B．Boss and secretary, C．Waitress and guest. D．Husband and wife.
A．Miss Smith. B．Miss White. C．Mr. Brown. D．Mr. Smith.
A．He has returned from a conference. B．He’ll have a conference next Friday. C．He’s waiting for the man in his office. D．He won’t be available until next Friday.