句型：I like playing... — 英语填空题
题目
看句子，选出合适的运动单词填在横线上（备选词：running, swimming, playing ping-pong）。Lily is at the pool. She says: I like ___. Tom is on the playground. He says: I like ___. Mary has a ball and a paddle (球拍). She says: I like ___.