问题描述：
I like singing.my sister likes singing too (改为同义句) my sister and I singing
I like singing.my sister likes singing too (改为同义句)
my sister and I( )( )singing,中间两个单词啊
I like singing.my sister likes singing too (改为同义句)
my sister and I( )( )singing,中间两个单词啊
问题解答：
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