promod dey Posted February 29, 2012 Share Posted February 29, 2012 Sentence: "Scientists have proofed that photovoltaic cells convert sunlight into energy." Question: Is there any problem in the above sentence? Quote Link to comment Share on other sites More sharing options...
mykie733 Posted July 26, 2012 Share Posted July 26, 2012 Scientists have proved that photovoltaic cells convert sunlight into energy. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.