单选题 ______ the heavy snow they could have arrived there earlier.
【正确答案】 A
【答案解析】[分析] for all表示“…尽管”,如:He is a poor musician for all his training.尽管他受到过很多训练,他还是个蹩脚的音乐家。above all表示“首先,最重要的是”,如:Above all he is a first- rate mathematician. 首先他是个一流的数学家。except for 表示“除…之外”,如:Now the wood was silent except for the leaves.现在除了树叶的沙沙声外,整个树林一片寂静。