The sun is 93__________away from the earth.(A:million mile B :millions miles C:millions mileD:millio

题目

The sun is 93__________away from the earth.(A:million mile B :millions miles C:millions mileD:million miles)
选哪个？为什么？

答案

选D,因为mile是的复数是在其后加"s"
而像“million”,"billion","hundred","thousand"这些词只有在后面加了“of”表示“成千上百的”或者“成千上万的”这种虚数时才用复数的.其余表示确定的数字只用单数.