问题描述:
____ he took part in the competition,he won a second prize.
A.For the first time
B.At a time
C.At one time
D.the first time 请问为什么选D,求详解,再谢!
A.For the first time
B.At a time
C.At one time
D.the first time 请问为什么选D,求详解,再谢!
问题解答:
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