EXERCISE 3I. CHỌN TỪ/ CỤM TỪ THÍCH HỢP (ỨNG VỚI A, B, C, D) ĐỂ HỊAN TH...

14. It would appear that the main danger ahead is that ___________A. man will destroy everything on Earth.B. man will use up all the fuel.C. there will be a population explosion.D. more species of animal may die out.