one out of.One out of every twenty students____dropped from the c_英语解答

one out of.
One out of every twenty students____dropped from the course each term.
A.is B.are
请问,这里为什么是A呢.

人气：344 ℃　时间：2020-04-25 22:27:34

解答

主语是"ONE OUT OF EVERY TWENTY SS" 每20个学生当中有一个,表示一个学生怎么怎么样,是单数