请教NN们一道语法题

1.Despite protests from some waste-disposal companies, state health officials have ordered the levels of bacteria in seawater at popular beaches to be measured and that the results be published.

A. levels of bacteria in seawater at popular beaches to be measured and that the results be

B. that seawater at popular beaches to be measured for the levels of bacteria, with the resulting being

C. the measure of levels of bacteria in seawater at popular beaches and results to be

D. seawater measured at popular beaches for levels of bacteria, with their results

E. that thelevels of bacteria in seawater at popular beaches be measured  and the results

答案选e， 可是我觉得以前做过的题不是说两个并列的从句的that不能省略吗？这里为什么可以省？

2.A recent national study of the public schools shows that there are now one microcomputer for every thirty-two puplis, four times as many than there were four years ago.

A. there are now one microcomputer for every thirty-two puplis, four times as many than there were

B. there is now one microcomputer for every thirty-two puplis, four times as many than there were

C. there is now one microcomputer for every thirty-two puplis, four times as many as there were

D. every thirty-two puplis now have one microcomputer, four times as many than there were

E.  every thirty-two puplis now has one microcomputer, four times as many as

答案是c,我知道应该怎么选，可是我想问c的最后一次个词为什么要用were而不用was啊，前面不是用的is吗？谢谢

这两道语法都是OG上的，LZ查了讨论贴了吗？

1：OG10-218

2：OG10-89

LZ先做OG吧，看完OG的语法之后，会发现白勇书里的例题有一大半都是来自OG。

先看OG关于每一题的解释，然后再看白勇书上的概括讲解，之后再看白勇例题的讲解。

我自己是这样做的。