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

45. It’s obvious that the child has run away.A. The child must have run away. B. The child might have run away.C. The child need have run away. D. The child could have run away.