【C13】A．for whatB．for whoC．for whomD．for whoever

【C20】A．in thatB．for whichC．with whomD．by whom

A．Courses for doctors.B．Courses for businessmen.C．Courses for reporters.D．Courses for

______ is quite difficult for Mary to pass the interview.A．WhatB．ThisC．ThatD．It

【C4】A．For this sakeB．For that matterC．For a timeD．For example

【C13】A．YetB．As a resultC．AlsoD．For example

"For instance" means（).A、for exampleB、for sake ofC、at instanceD、instantly