Who are they？分析：is复数为are。he是他，复数应是他们，则是they。
Who are they
who are they
WHO ARE THEY
who are their?
Who are they?
Who is he?复数形式是什么?
Who are they？分析：is复数为are。he是他，复数应是他们，则是they。
Who are they
who are they
WHO ARE THEY
who are their?
Who are they?
Who are they？分析：is复数为are。he是他，复数应是他们，则是they。
Who are they
who are they
WHO ARE THEY
who are their?
Who are they?