The General Manager held a dinner party at the International Hotel _______ the foreign guests

I had hardly sat down_____ the telephonerang

依次填入下列各句横线处的成语，最恰当的一组是（ ）①公众人物广受关注，其言行对社会起着示范作用，所以更应该 ，努力做道德风尚的引领者和社会进步的推动者。②领导干部学习贯彻党的群众路线，不能停留在口头宣传上，而应 ，在实际工作中认真落实。③在淮阳东北与日军作战的时候，张将军 ，奋勇杀敌，带领部队挺近敌后，取得了战斗的胜利。

My brother likes eating very much but he isn’tvery ____ about the food he eats.

_is often the case with elder people, my grandmatalked about my new hairstyle for at least 30 minutes