定语从句专练为什么会有定语从句?定语从句? 它是如何产生的?This is Gary.Gary is teaching English.This is Gary Gary is teaching Englishwho1. 定语从句前要有名词或代词。2. 关系词在句中充当一定的成分。3. 关系词就是指前面的名词或代词。1 )关系代词: 先行词为人: who, whom, that, whose 先行词为物: which, that, whose2 )关系副词: when, where, why1 什么是关系词?2 有那些关系词?关系代词和关系副词有什么区别?1 . All ____ is needed is a supply of oil. ( ’89 )A the thing B that C what D which2 . He paid the boys $10 for washing ten windows, most of ____ hadn’t been cleaned for at least a year. ( ’90 )A these B those C that D whichBD3 . In the dark street, there wasn’t a single person ____ she could turn for help. ( ’92 )A that B who C from whom D to whom4 . After living in Paris for fifty years, he returned to the small town ____ he grew up as a child. A which B where C that D when ( ’96 )DB5 . Dorothy was always speaking highly of her role in the play, ____, of course, made the others unhappy. ( 2000 )A who B which C this D what6 . It was about 600 years ago ____ the first clock with a face and an hour hand was made. ( ’97 )A that B until C before D when BA7. His parents wouldn’t let him marry anyone ______ family was poor.A.of whom B.whom C.of whose D.whose8.She heard a terrible noise, _______ brought her heart into her mouth. A. it B. which C. this D. that 9.The weather turned out to be very good , _______ was more than we could expect.A.what B.which C.that D.it 10 . Carol said the work would be done by October. _____ personally I doubt very much. A. it B. that C. when D. which11.Recently I bought an ancient Chinese vase , _____ was very reasonable.A. which pr...