【C7】A．whichB．whoC．thatD．why

【C4】A．whichB．whatC．thatD．it

A．whichB．whatC．thatD．those

【B15】A．WhichB．WhoC．WhenD．What

【C8】A．whatB．whoC．thatD．where

【C15】A．whenB．whoC．thatD．what

【C14】A．whichB．whoC．thoseD．whom