题目内容：
As far as I could tell, he had never done one happy, noisy kid thing.A. As far as I could tell, he had never done one happy, noisy kid thing
B. As far as I knew, he had never made friends with other kids.
C. As far as I knew, he had never played happily with other kids
D. As far as I knew, he had never been so naïve and childish like other kid
参考答案：