I think it’s going to be a big problem–Yes, it could be –I wonder ________ we can do about it

依次填入下面一段文字横线处的语句，最恰当的一组是（ ）那条河水便是历史上知名的酉水，新名字叫作白河。 。 近水人家多在桃杏花里，春天时只须注意，凡有桃花处必有人家，凡有人家处必可沽酒。①深潭中为白日所映照，河底小小白石子，有花纹的玛瑙石子，全看得明明白白。②白河下游到辰州与沅水汇流后，便略显浑浊，有出山泉水的意思。③水中游鱼来去，全如浮在空气里。④两岸多高山，山中多可以造纸的细竹，长年作深翠颜色，逼人眼目。⑤若溯流而上，则三丈五丈的深潭可清澈见底。

It was not until mid-night _____ he went back home after the experiment.

We are in a difficult position in____ we have nobody properly qualified for this work.

The little girl ___ out in the dark at night.