请教大全的两道题目，谢谢

4. 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(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

为什么用的是there were而不是there was,

ABD一看就是错的，as many than 是个错误的短语。

E的比较unclear，有可能比较thirty-two pupils ，也有可能比较one microcomputer。

至于C为什么对……可能比较的是thirty-two pupils 吧，我比较喜欢用排除法做题，呵呵。

5. A recent New York Times editorial criticized the city’s election board for, first of all, failing to replace outmoded voting machines prone to breakdowns, and secondarily, for their failure to investigate allegations of corruption involving board members.
(A) secondarily, for their failure to
B(B) secondly, for their failure to
(C) secondly, that
            they failed and did not
(D) second, that they failed to
(E) second, for failing to

first of all对应的是second of all，而题目中把of all 省略了？
还有，此类序数词的对应还有哪些啊，比如firstly对应secondly等等