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Answer   Key
                                                       UNIT 6



             9    Complete the sentences.






























                                                scientist
             Hello! My name is Zuma. I’m a ....................... . Let’s do a(n) ....................... . First,




             .......................      some water in the glass and .......................







             some oil on the water in the glass. .......................           it. .......................






                                     it. Watch what happens. Can you ....................... water and oil? No, you








             can’t. Where is oil? It is on the water                 .













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