This problem is really hard_______ .A.to work out B.to be worked out C.working out D.worked ou此题为什么选A不选B呢?或此题正确做法是?
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Thisproblemisreallyhard_______.A.toworkoutB.tobeworkedoutC.workingoutD.workedou此题为什么选A不选B呢?或此题正确做法是?
This problem is really hard_______ .A.to work out B.to be worked out C.working out D.worked ou此题为什么选A不选B呢?或此题正确做法是?
This problem is really hard_______ .A.to work out B.to be worked out C.working out D.worked ou
此题为什么选A不选B呢?或此题正确做法是?
This problem is really hard_______ .A.to work out B.to be worked out C.working out D.worked ou此题为什么选A不选B呢?或此题正确做法是?
英文中,有时使用主动语态来表达这种被动语态.这个句子中Problem应该是动作的接受者,但是用主动语态来表达”被解出“.类似的句子还有：
1. The house needs cleaning.
房子需要（”被“）清扫.
2. The pen writes well.
这个钢笔（”被“）写的流畅.
你可以看一下英文中主动表被动的归纳总结：
http://wenku.baidu.com/view/1cb44a7d27284b73f2425098.html
problem难题，需要“被解出”，要用被动语态be +过去分词 的结构，所以是B
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