根据短文，回答下列各题。

Frank Lloyd Wright probably is the greatest architect that the United States has ever pro-duced．He was very____21____and had a natural ability____22____．His buildings were not onlybeautiful，but they were____23____ functional．They fit their purposes very well．Wright's churches，24 make people feel like____25____．His office buildings make people____26____ working，and hishouses make people____27____ comfortable，at home．However．Wright’S beautiful，____28____ buildingsare not the only reason____29____ he is famous．There is another reason．

Frank Lloyd Wright is called the greatest American architect because he started an Ameri_can style. ____30____ ．Most of the architecture in the U．S．before Wright was really European，____31____．Wright’s buildings do not____32____old European buildings．They have their own____33____．Wright's ideas about style. are still used in the U．S．and in other parts of the worhh．The most important idea in Frank Lloyd Wright's Style. of Architecture is that a buildingmust34 and the land around it．His houses are often called“grassland houses’’becausetlleir lines are35 to the lines on the grass land．____36____the lines of the grassland and thelines of Wright's houses____37____．the homon，the place____38____earth and sky seem to meet．Theyare horizontal lines．Most European style. houses，____39____，have many vertical lines that form. 90°angles ___40___ the horizon．

第21题答案为：