依次填入下列各句横线处的成语，最恰当的一组是（ ）①中国人民把维护民族团结作为自己 的职责，把维护国家主权和领土完整作为自己至高无上的使命。②政府对于保护海港及遵守保护海港条例，更加 。我们需要好好保护海港，将它延续给我们的世世代代。③在英语比赛中，我们班的选手们 ，勇敢挑战一道道难题，最终为班级争得了荣誉。

The Town Council decided not to 　　　　in the financing of the new swimming pool, but to leave the fund-raising entirely private enterprise.

The researchers who study jokes want to know people from different nations and cultures find funny.

We saw _____farms which were built more than a hundred years ago.

The boy promises _________ late for school again.