no wonder引导什么从句

　　He had made a thorough investigation. No wonder he knew so much about it.

　　他对此事做了彻底的调查，怪不得他了解得那么多。

　　No wonder you can't find anybody here; they're all away at a meeting.

　　难怪找不到人，都开会去了。

　　No wonder she looks so familiar; she is my former student.

　　她是我过去的学生，怪道觉得很眼熟。

　　The door was locked, so it's no wonder you couldn't open it.

　　门是锁着的`，无怪你打不开。

　　No wonder her fingers are stained brown, she smokes like a chimney.

　　她烟抽得很厉害，难怪她的手指都熏黄了。