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Ⅱ 、完形填空。 Is f ood im po rt ant to us ? T he answ e r is YE we do not eat __ 4 __ , w e will feel hung r y .I f we ca n no t fin d f ood when __ 5 __are hungry , we m a y feel ver y __ 6 ay be we ca n beco m e sic k , then die la te r . Now we ha ve an oth e r prob le m .I f we eat , what ki nd of f ood is __ 7 __ f or us ? Is m eat better tha n veg et a bles a nd fruit ? __ 8 __ a re ve getabl es an d f ru it __ 9 __ t han m e at ? Fo r so m e peo ple , it is ver y ea sy to ans wer this __ 10 __ : V egetables a nd f ru it a re su rely ( 一定 ) be tt er than m eat , beca us e the y __ 11 __eat m eat . For m os t of us , it is no t ver y e asy to decide on __ 12 __ i s bette r . D octo rs say it is not reall y i m po rtant for us to deci de on wh ic h is b