单选题 The obstacles we faced in our task were so great that we could ______ tide over them to our own.
【正确答案】 D
【答案解析】[解析] easily“轻易地”，adequately“充足地”，negatively“负面地”，scarcely“几乎不，简直不”。句意为“我们在任务中面临的困难是如此的艰巨。我们几乎没有办法依靠自己克服它们”。故选D。