■ congratulations

这个意为“祝贺”的名词，必须用复数形式（祝贺的原因前面用介词 on）。

• Let me offer you my congratulations on your success.请让我对您的成功表示祝贺。

• other
• other than
• otherwise
• otherwise than
• out
• out-
• out East
• outlive
• outlive 与 survive
• out of
• outside
• outskirts
• out West
• over
• over-
• overemphasize
• overestimate
• overstate
• overwhelming majority
• own
• ox
• package
• pain
• painful
• painter