write soon
尽快回信；尽快写信；速回信
例句
1.Please write soon! Yours, Kitty.
请尽快回信。谨上，基蒂。
2.Please write soon because we can't wait indefinitely for your answer.
请快点来信因为我们不能无限期地等你的答复。
3.Be sure to write soon. I am eager to hear from you.
记得要早点回信，我很想早点收到你的来信。
4.Write soon , please.
请尽快来信。
5.Write soon, and say you can have the holidays here.
写快点，然后告诉我你可以在这度假。