GRE Text Completion: ETS Fundamental-GRE填空ETS基础 - XHC764VUO75L47Q0X

Any population increase beyond a certain level necessitates greater (i)____________ vegetable foods; thus, the ability of a society to choose meat over cereals always arises, in part, from (ii)____________ the number of people. A. recourse to B. replenishing C. spending on D. limiting E. exporting of F. varying