1.they planted and water ted the trees 画线的是 the trees 2.They collect stamps 加pictuere 变疑问句
问题描述：
1.they planted and water ted the trees 画线的是 the trees 2.They collect stamps 加pictuere 变疑问句
1.they planted and water ted the trees 画线的是 the trees 2.They collect stamps （加pictuere 变疑问句）
答
What did they plant and water?
Do thery collect pictures?