1. John decided that in 3 days he would go to visit his great-grandparents. 2. I do not know what their home is on the shore of a lake. 3. Anna asked us if we had ever been on the banks of the Mississippi. 4. The student said that he could not name any deserts in Australia. 5. I wanted to understand why they had done it. 6. Little John did not know at what temperature metals melt. 7. We asked when we would go back to London. 8. He did not believe that I had never seen skyscrapers. 9. The teacher asked what major (mighty) rivers in Russia and America we knew.