老师用黑板擦擦掉了错误的答案。

The teacher used an eraser to ___erase the wrong answer from the blackboard.

我不小心把U盘里的重要文件清除了。

I accidentally ___erased the important files from my USB drive.

他决定彻底删除那段不愉快的回忆。

He decided to ___erase that unpleasant memory completely.