Oil it.
注：這里的mouse指“鼠標(biāo)”。
更多英語(yǔ)謎語(yǔ)
How do you make a fisherman's net?
How can you stop a sleepwalker from walking in his sleep?
How can you light a candle with a box of candles and no matches?
If a neighbor's peacock laid an egg in your yard，whose egg would it be?