For question 1 - option D is wrong as we are not talking about some experiment used in general designed to clean the bodies of water; P4 talks about an experiment designed to clean the Solar ponds to produce energy. Option A is correct; as the passage's last sentence says, "providing energy for human use" means energy source. - correct.
Statistics : Posted by Raman109 • on 09 Jun 2008, 09:39 • Replies 37 • Views 27628
