I'm very sorry for what has happened,the bad result ought to have been pointed out to those ( ) at the very beginning.
A to concern
B concerning
c having concerned
d concerned
为什么选D
人气：189 ℃ 时间：2020-02-03 19:25:45
解答
你可以去查查concerned的用法,
前面用了“has happened”说明是过去式,所以应该选D
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