What makes naughty boys long to work in a clock factory?

谜语题目： What makes naughty boys long to work in a clock factory? (淘气的男孩为什么想去钟表厂工作？)
 
 
谜语解析：They want to make faces. (make face 做鬼脸，做钟表面)
 
 
谜语答案：They want to make faces. (make face 做鬼脸，做钟表面)

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