Adventureworks DB is not attaching into my local host

Hi all,

this is the version of sql server 2008 r2 am using , now i want to attach adventureworks db for practising , pl provide the link

Microsoft SQL Server Management Studio      10.50.2500.0
Microsoft Analysis Services Client Tools      10.50.2500.0
Microsoft Data Access Components (MDAC)      6.1.7601.17514
Microsoft MSXML      3.0 6.0
Microsoft Internet Explorer      8.0.7601.17514
Microsoft .NET Framework      2.0.50727.5448
Operating System      6.1.7601

thanks