An alarm clock.
注：alarm clock goes off意思是“鬧鐘響了”，同時(shí)go off也有“走開(kāi)”的意思。
更多英語(yǔ)謎語(yǔ)
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What always ends everything?
I'm the part of the bird that's not in the sky. I can swim in the ocean and yet remain dry. What am I?
Which word in the English language becomes shorter when lengthened?