Whoever thought up that joke?

　　究竟是誰(shuí)想出那個(gè)笑話的？

　　The thought seemed to amuse him.

　　這個(gè)想法好像讓他覺(jué)得好笑。

　　He sighed deeply at the thought.

　　想到這里，他深深嘆了口氣。