1. 你的這項提議不甚恰當。
   This proposal of yours hardly meets the case.
2. 現在是向您表達感激之情最為恰當的時刻。
   It is the most appropriate time to show you our thanks.
3. 現在向您表達我們對您的感激最為恰當。
   It's the appropriate time for showing you our thanks.
4. 讓我們設想突然發(fā)生一場罷工，采取什么樣的行動才是最恰當的。
   Let us imagine that a strike suddenly happens. What would be the most appropriate course of action?
5. 他苦苦思索尋找恰當的詞語。
   He ransacked his memory for suitable words.

當的英語翻譯：