He___the truth.Otherwise he might have known it was Tom who had taken his place.A.should have been told B.shouldn't have been toldC.couldn't have been told D.must have been told答案应该选C,为什么?请说明原因,

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He___the truth.Otherwise he might have known it was Tom who had taken his place.A.should have been told B.shouldn't have been toldC.couldn't have been told D.must have been told答案应该选C,为什么?请说明原因,

He___the truth.Otherwise he might have known it was Tom who had taken his place.A.should have been told B.shouldn't have been toldC.couldn't have been told D.must have been told答案应该选C,为什么?请说明原因,
He___the truth.Otherwise he might have known it was Tom who had taken his place.
A.should have been told B.shouldn't have been told
C.couldn't have been told D.must have been told
答案应该选C,为什么?请说明原因,

He___the truth.Otherwise he might have known it was Tom who had taken his place.A.should have been told B.shouldn't have been toldC.couldn't have been told D.must have been told答案应该选C,为什么?请说明原因,
1might have known说明他不知道TOM占他的位置
虚拟语气,表示他本不可能被告知真相
否者他会知道TOm怎么怎么样(实际他不知道)
根据句意只能C,青体会