单项选择题A.At least 14 miles an hour.B.At least 40 miles an hour.C.At most 40 miles an hour.D.At most 14 miles an hour.
单项选择题A.Because the quality of water decides its volume.B.Because health conditions affect the amount of water needed.C.Because there’re different sizes of glasses people use.D.Because there’s also water in foods and beverages.