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

14. - How often do the buses run?  “___________”.A. From that bus stop over there. B. Much oftenC. Twice or three times. D. Every hour.