duplicate titles

My google webmaster tools is showing many node URLs on the site being gotten duplicate. Actually I used Quick Tabs module almost a month ago and it created duplicate URLs such as

http://example.com/content/abc-def-ghi?quicktabs_1=0
http://example.com/content/abc-def-ghi?quicktabs_2=0
http://example.com/content/abc-def-ghi?quicktabs_8=2, etc

for the actual URL

http://example.com/content/abc-def-ghi.