20

Although the manager agreed to a more flexible work schedule, he said that it must be posted on the bulletin board so that both management and the labor will know what everyone is assigned to do.

A.     he said that it must be posted on the bulletin board so that both management and labor will know what everyone is

B.     he said it has to be posted on the bulletin board so that both management and labor knows what everyone is

C.     he said that they would have to post the assignments on the bulletin board so that management and labor knew what everyone was

D.    he said that the schedule would have to be posted on the bulletin board so that both management and labor would know what everyone was

E.     saying that the schedule had to be posted on the bulletin board so that both management and labor would know what everyone had been

除了C我能感觉到明显不对， 其余都感觉模糊！

这个题目也很有意思

E这个选项的错误是非常明显的，saying that 从句 使得整个句子不完整，缺少主句；

C这个选项你也看出来了，they没有明确的纸带对象；

B这个选项的错误也相对明显，缺少宾语从句的引导词that，同时并语从句里面has to 和so that从句里面的knew时态上不协调

真正能够混淆我们判断的实际上是A和D之间

AD两个选项在said从句里时态都是协调的，惟一明显的差别是在must和have to上

在GMAT中，must表达的是一种烛光上的必须，而have to则表达的是一种客观上的必须

如果用中文说 must = 应该，必须，而 have to = 得

I must go = 我应该走了 （因为主观的某些原因，比方说不想呆了）

I have to go = 我得走了 （因为客观的一些原因，比方说再不走就坐不上飞机了）

那么这个题目里面我们会发现 must其实是更合适的

这里多说一句，must这个词汇没有过去时，如果一定要用在过去时态，则用had to 替换，但是如果所使用的环境是宾语从句，则直接使用must而不用had to

希望这样的解释能帮到你

嗯嗯， 估计能推到A,D之间也好办了， 不过A和D, 一个用was, is, 一个用the schedule, 一个用it, 当然， 如果看must还有will搭配起来， 还是原句的强烈语气应该留下， 所以很同意， 呵呵呵， 又理解多点了， thank you!