A.needn't bring如果选A的话,need在这句话里是一个情态动词,needn't bring表示 不准带来,代入题中不符合题意.
B.didn't need to bring选B的话,need是一个行为动词,didn't need to bring表示 不需要带来
You were not allowed to use it.指你们不允许用字典,但是没有说不能带来,所以B更符合题意
A.needn't bring如果选A的话,need在这句话里是一个情态动词,needn't bring表示 不准带来,代入题中不符合题意.
B.didn't need to bring选B的话,need是一个行为动词,didn't need to bring表示 不需要带来
You were not allowed to use it.指你们不允许用字典,但是没有说不能带来,所以B更符合题意