请教问题

fuchaoyang

22.A recent national study of the public schools shows that there are now one microcomputer for every thirty-two pupils, four times as many than there were four years ago.
(A) there are now one microcomputer for every thirty-two pupils, four times as many than there were
(B) there is now one microcomputer for every thirty-two pupils, four times as many than there were
(C) there is now one microcomputer for every thirty-two pupils, four times as many as there were
(D) every thirty-two pupils now have one microcomputer, four times as many than there were
(E) every thirty-two pupils now has one microcomputer, four times as many as
the key:C。

为什么C中用复数were，想请教--摆脱.

mindfrees

后面省略了microcomputers。

前面是one microcomputer所以只能用is，其实是可数名词数量（即复数）比较的概念。