谜语:what is it that fals often but never gets hurt?

谜语:what is it that fals often but never gets hurt? What is it that we never borrow but often return?(谜语) 猜谜what fallls often but never gets hurt? what falls often but never gets hurt什么意思 英语翻译谜语：1 What is that we never borrow but often return?2 Wha What falls but never gets hurt? 请教What often falls but never gets hurt?用英语回答 what falls often but never hurt? what falls but never gets hurt,英语答案是什么? what falls down all the time but never gets hurt? 谜语：What never asks any questions but always gets answers? What is it that we never borrow but often return?脑筋急转弯