When will the bike-sharing schemes be introduced to the public— Not until a better understanding of them.

在下面两段话空缺处依次填入词语，最恰当的一组是（ ）（1）竹是什么呢竹本固，不 ；竹心空，不 ；竹性直，不趋炎附势；竹节贞，不改志向，所以，竹是君子的化身。（2）无论如何作出结论，有一点是的 ：柏杨首先是一个文学家，然后才是文化学者和历史学家。

Upon arriving home, Lily found that her husband _____ a beautiful candlelight dinner.

The police have ____ power to deal withsuch matters by ____ law．

I do not believe __________ he has never been to the USA.