You should receive a reply within seven days.

你会在七天之内收到答复。

《牛津词典》

If we don't receive a reply by tomorrow morning, I shall have to get on to him.

如果明天早上我们得不到答复，我们还得和他联系。

《新英汉大辞典》

Jack: Don't forget to ask when you can receive a reply.

杰克：别忘记诚恳地询问，什么时候可以得到答复。

youdao

Mr Warnock sent an e-mail to the White House but has yet to receive a reply.

BBC: Dubya doll flies off shelves

He sent him an email and was astonished to receive a reply within 15 minutes.

FORBES: A 3-Step Plan To Get Into Your Startup Hero's Inbox

She had sent a fax to the Border Agency outlining the situation, but did not receive a reply.

BBC: Border Agency's visa renewal delay angers grieving woman