Google spreadsheets was blocked

I was not able to access my online excel sheets hosted in spreadsheets.google.com, initially I didn't realized that it was blocked by GFW, according to most of articles posted in all kinds of forums, I added below contents into c:\windows\system32\drivers\etc\hosts

• 64.233.189.101 writely-china.l.google.com
• 74.125.127.100 writely.google.com
• 209.85.225.101 docs.google.com
• 74.125.127.139 spreadsheets.google.com

But it doesn't work either. What I can do is to start Tor and add *spreadsheets.google.com/* into FoxyProxy whitelist, finally it works