You had better own up.

　　你還是招了的好。

　　Don't send anyone else; you had better go yourself.

　　這事甭支別人了，你自個兒去吧。

　　I'm not clear about this matter, so I had better keep quiet.

　　我對這個問題不清楚，只能不贊一詞。

　　This fellow is very crafty; we had better be on our guard.

　　這個家伙詭計多端，我們可得小心點兒。

　　I had better say a few words by way of explanation.

　　我最好以解釋的方式說幾句話。