Tina ___ the truth,otherwise she would have told us.A.mustn't have knownB.shouldn't have knownC.can't have known

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Tina___thetruth,otherwiseshewouldhavetoldus.A.mustn''thaveknownB.shouldn''thaveknownC.can''thaveknownTi

Tina ___ the truth,otherwise she would have told us.A.mustn't have knownB.shouldn't have knownC.can't have known
Tina ___ the truth,otherwise she would have told us.
A.mustn't have known
B.shouldn't have known
C.can't have known

Tina ___ the truth,otherwise she would have told us.A.mustn't have knownB.shouldn't have knownC.can't have known
C
语法上BC都对,C的语气更肯定,她不可能知道,联系下句选c比较通顺

A

A

C.can't have known 不可能知道

Tina ___ the truth,otherwise she would have told us.
A.mustn't have known
B.shouldn't have known
C.can't have known
should be C !!