What sport do waiters and waitresses excel in?

谜语题目：What sport do waiters and waitresses excel in?（服务员最擅长什么运动？）
 
 
谜语解析：Tennis． They really know how to serve．打网球。因为他们熟谙发球。
 
 
谜语解析：Tennis． They really know how to serve．打网球。因为他们熟谙发球。

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