对下列句子排序正确的一项是①如果只到“欸乃一声山水绿”结束，此诗还只是表现了人间实境，而最后两句则使人大有飘然出世之感，仙境之味顿出。②对于这样以景语作结的作品，我们切不可以单纯的景语视之，而应揣摩、感悟其中蕴涵的诗情。③如柳宗元的《渔翁》诗，有人认为应以“欸乃一声山水绿”作结，后两句景语“回看天际下中流，岩上无心云相逐”乃蛇足。④还有些作品的意境和韵味，全靠结尾处的以景言情之句，方显出其言有尽而意无穷。⑤我们可以从中看出柳宗元被贬时孤傲高洁、超然物外的逸趣。⑥其实，这两句对渔翁的生活环境作了更为生动的描绘，系诗境的进一步开拓和升华。

He set up a primary school in his hometown __________ his late father.

We had just covered half the journey________the engine failed and we could do nothing but wait for help

They______ with each other for two years before they got married

_difficult the task may be, we must finish it on time, because we can’t meetsuch a precious opportunity _______ we have expected.