I had been puzzled over the problem for over an hour without any result, all at once a solution flas_刷题宝

题干

I had been puzzled over the problem for over an hour without any result, all at once a solution flashed across my mind.

A：while

B：whe

C：the

D：a

上一题下一题 0.0难度选择题更新时间:2016-01-24 03:27:54

答案(点此获取答案解析）

B

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