the river in front of my house was ,but it's clean now.改同义句：the river in front of my house —— —— ——dirty before.每个空填一个单词

the river in front of my house was ,but it's clean now.改同义句：the river in front of my house —— —— ——dirty before.每个空填一个单词
the river in front of my house was ,but it's clean now.改同义句：
the river in front of my house —— —— ——dirty before.每个空填一个单词

the river in front of my house was ,but it's clean now.改同义句：the river in front of my house —— —— ——dirty before.每个空填一个单词
used to be