最佳答案:光彩夺目
最佳答案:专心致志致:尽,极;志:意志.把心思全放在上面.形容一心一意,聚精会神.【出自】:《孟子·告子上》:“夫今弈之为数,小数也,不专心致志,则不得也.”【示例】:不
最佳答案:从动词know的过去分词形式就知道这句是虚拟语气的完成时:I would have known that ...所以'da = would have