核心问题
No wonder he knew so much about it. 难怪他对此事了解很多。（《新英汉词典》，p.1625）请问如何分析这个句子？
词典解答
No(Little, Small) wonder 是 It's no(little, small) wonder that 的省略形式。it 和 that 从句是同位语关系，也就是说 that 从句是主语从句(连词 that 常常省略):
-
No wonder you were so late. 难怪你来得这么迟。
-
No wonder you can't sleep when you eat so much. 你吃这么多睡不着觉,那是毫不奇怪的。
-
Small wonder that they refused the offer! 怪不得他们拒绝了这个建议!
____ he plays so well. They have their own private tennis court on which he practises every day.
A. No wonder B. No doubt C. Without exception D. Without question