9．involved　[考查非谓语动词。很多人避免在这一天购物，因为会卷入抵抗人群的压力中。involve与stress为逻辑上的动宾关系，故用过去分词作定语。]

　　10．has seen　[考查时态和主谓一致。根据时间状语In recent years可知，本处应用现在完成时，主语the Saturday before Christmas为单数，故用has seen。]

　　(2016·广西桂林、崇左市高三4月联考)Our modern life is changing our eating habits.We are spending too much time in front of TV or computers and __1__(become) “couch potatoes” or “mouse potatoes”．We also eat too much junk food and we don’t get enough exercise.The foods we find in the supermarket are sometimes no

　　__2__(benefit) to us，and it is difficult to know exactly __3__

　　we are eating when we buy ready－made or pre－prepared dishes.Considering this situation，it is becoming __4__(much) important than ever

　　__5__(make) sure that we keep a healthy diet.

　　A healthy diet gives us the calories we need and don’t contain too much fat.The number of calories we need

　　__6__(change) depending on what kind of body we have (are we short，tall，heavy etc.)and how active we are.Quality food，or healthy food，gives us calories in the best way.Junk food，__7__

　　the other hand，gives us few calories and lots of fat and sugar.If we eat too much fat and sugar，we will put on

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