We ought tohelp each other in our work,___?A.should we B.oughtn't weC.shouldn't we D.ought we答案应该选B,为什么?请说明原因,

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We ought tohelp each other in our work,___?A.should we B.oughtn't weC.shouldn't we D.ought we答案应该选B,为什么?请说明原因,
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We ought tohelp each other in our work,___?A.should we B.oughtn't weC.shouldn't we D.ought we答案应该选B,为什么?请说明原因,
We ought tohelp each other in our work,___?
A.should we B.oughtn't we
C.shouldn't we D.ought we
答案应该选B,为什么?请说明原因,

We ought tohelp each other in our work,___?A.should we B.oughtn't weC.shouldn't we D.ought we答案应该选B,为什么?请说明原因,
前面主句用了什么情态动词,后面的反意疑问也要用同一的情态动词.又:
should======ought to

ought to属于情态动词可直接提问。
而前肯后反。所以选B