Definition: If you do something by mistake, you do it without intending to. Level: B1
我误拿了别人的书。
I picked up someone else's book ___by ___mistake.
我误付了这笔账单两次。
I've paid this bill twice ___by ___mistake.
30分钟后，一个男人出现告诉我们他误拿了我们的行李箱。
After 30 minutes, a man appeared telling us that he had taken our suitcases ___by ___mistake.
