PS:请写出为什么Sorry,sir.I can't answer this question.--Well,you are supposed _____ this part of history.A.reading B.to be reading C.to have read D.having read

PS:请写出为什么Sorry,sir.I can't answer this question.--Well,you are supposed _____ this part of history.A.reading B.to be reading C.to have read D.having read
PS:请写出为什么
Sorry,sir.I can't answer this question.
--Well,you are supposed _____ this part of history.
A.reading B.to be reading C.to have read D.having read

PS:请写出为什么Sorry,sir.I can't answer this question.--Well,you are supposed _____ this part of history.A.reading B.to be reading C.to have read D.having read
选择C.虚拟语气用法.

这道题应该选择选项c，suppose 在这里是“应该”的意思，用语被动语句。所以是supposed to do 选c
短文翻译
对不起，先生。这个问题我回答不上来
好吧，你应该看下这部分的历史。

suppose 在这里是“应该”的意思，用语被动语句。所以是supposed to do 选c
短文翻译
对不起，先生。这个问题我回答不上来
好吧，你应该看下这部分的历史。

选C把
be supposed to do是一个词组，意为应该
∴be supposed to have done意思应该是：应该这样做却没有这样做
答句的意思是：好吧，你应该已经读过这部分历史了。

短语 be supposed to do应该做某事

是B。。。 ＝ ＝“ 相信我。。我国际学校滴。。

C be supposed to do sth. 你应该做了什么。根据上下文是说这个人应该读过这部分。
个人意见，仅供参考。
PS：给你找了下柯林斯字典。
PHRASEIf something was supposed to happen, it was planned or intended to happen,
but did not in fact happ...

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C be supposed to do sth. 你应该做了什么。根据上下文是说这个人应该读过这部分。
个人意见，仅供参考。
PS：给你找了下柯林斯字典。
PHRASEIf something was supposed to happen, it was planned or intended to happen,
but did not in fact happen. 本应该

例：He was supposed to go back to Bergen on the last bus, but of course the accident prevented him.
他本应坐最后一班公共汽车回卑尔根，但当然，这场意外拦住了他。

PPS：这题怎么这么像中国老师出的。按照字典上说，suppose用在句子里本来就可以表示应该做而没做的事了。选项里给 have read 用完成时不是有点多此一举吗？

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