Where's the baseball?（变成复数形式）

Where's the baseball?（变成复数形式）
Where's the baseball?（变成复数形式）

Where's the baseball?（变成复数形式）
Where are the baseballs?
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Where are the baseballs? 棒球哪里去了？

Where are the baseballs？

Where are the baseballs? 那些棒球在哪里？