went to the mountains 为什么要加the 后面加不加the 怎么确定?

went to the mountains是什么意思 went to the mountains ,went to the mountain we went to _____ the mountains clmb mountains和went to the mountains的区别? we went to the mountains d------the summer vacation She went to the mountains(对画线部分提问)画线部分是The mountains She went to the mountains last weekend 变否定句 they went to the mountains last weekend改为疑问句 they went to the mountains for (c ) last month my family went to the mountains last summer. I went to the mountains on vacation变特殊疑问句 1.Jack went to the mountains ___ a rainy afternoon.