增加：在缺词处加一个漏字符号（∧），并在其下面写出该加的词。

删除：把多余的词用斜线（\）划掉。

修改：在错的词下划一横线（____），并在该词下面写出修改后的词。

注意：1）每处错误及其修改均仅限一词；

2）只允许修改10处，多者（从第11处起）不计分。

    Last weekend we went mountain-climbing. Even the heavy rain in the morning could not prevent us go. Setting off very early, we went along an extreme narrow road, all in high spirits. On every side of the road were green fields and some farm house. We could hear the sound of the rain and our footsteps mixing with laughter. At noon we reached top of the mountain. That surprised us most was the beauty of the scenes here. After having a short rest and sharing with the food we had brought, we started going down. It rained even harder. We are wet to the skin, and we still sang and laughed happily.

白居易的《琵琶行》中江头送客时写萧瑟秋景，夜晚在浔阳江头送客人，秋风吹着枫叶和荻花，传来瑟瑟之声。为全诗渲染悲凉气氛， 奠定基调的诗句是____，____。