____ he took part in the competition,he won a second prize.
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!
答
for the first time 第一次,是个副词短语 不应该放在句首
At a time 此时 意义不对
At one time曾经 同时 意义不对请问为什么副词短语不能放句首，谢谢！！！he took part in the competition for the first timefor the first time（“第一次”，与“从未”对立）, 是一个表时间的介词短语，在句子中做时间状语，常用于完成时,用于句末。如: I've been here for the first time.我是第一次来这里。