标题: CR蓝皮书的几道语法题，请大家赐教呀 [打印本页] 作者: xiaoyu612 时间: 2012-2-1 02:46 标题: CR蓝皮书的几道语法题，请大家赐教呀 On the great plains, nineteeth century settlers used mud and grass to build their homes, doing it without timber and nails. B settlers used mud and grass to build their homes, did it without C settlers used mud and grass to build their homes,making them while not having D settlers used mud and grass to build their homes,making do without E settlers' homes used mud and grass to build their homes,making do without