Food plays an important part in the development of nations. In countries where food is scare, people have to (61) ____ most of their time getting enough to eat. This usually slows (62) ____ progress, because men have little time to (63) ____ to science, industry, government, and art. In nations (64) ____ food is plentiful and easy to get, men have more time to spend on activities that lead to progress and enjoyment of leisure. The (65) ___ of providing good food for everybody has not (66) ___ solved. Many wars have been fought for food. But it is (67) ____ longer necessary to go to wars for food. Nations (68) ___ beginning to put scientific knowledge to work for a (69) ___ of their food problems. They work together in the Food and Agriculture Organization (FAO) to (70)____ hungry nations produce more food. PHẢI CÓ GIẢI THÍCH Ạ đúng+ nhanh+giải thích=5*+ctlhn+cảm ơn