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问题: 选什么? 为什么?

Johnson had made up his mind to give it up ,but on _______ second thoughts he determined to try ______ third time .
A. / , / B. a . a C. the, a D. / , a

解答:

选D.on second thought:进一步考虑;a third time :再来个第三次。the third time 强调顺序。