A-25：an open book 昭然若揭的事

A：What!Your golden watch is lost?

A: 什么?你的金表丢了?

B: Yeah.I just can't find it anywhere.

B：是啊，我哪儿也找不到。

A: It's an open book that it was stolen by the man in black.

A: 很明显是那个穿黑衣服的人偷的。

B: Let's get it back.

B：让我们去找回来。