Hit the correct logo "Which is the real logo?"

Since various companies and web service logos come out, it is just that it applies the correct thing, but similar things are staggered and it is the first time to completely answer without first removing it It is impossible ......

Play is from the following.
Which is the real logo?
http://www.guessthelogo.com/

For example, for the Amazon logo


In the case of Flickr


In case of Cnet ...... what is already what ... ....


Others such as Google and eBay are coming out, but it is a level that can not be determined any more in a moment. It seems that I remember this way and I do not remember ... ....