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问题: 请问此题选择哪个答案

You looked for it twice,but you haven't found it. Why not try ( )?
A three times B a third time
C the third time D once
请给出排除和选择的具体理由

解答:

选B.“再一,又一”用a加序数词(暗指第几次)
“你已经试过两次,为什么不再是一次呢?”