II. Rewrite each of these sentences without changing its original meaning 1.The scientists are studying the problem carefully. The problem ______________________________________________. 2. Somebody had already reported the accident before I phoned. The accident ______________________________________________. 3. These students should have finished the tasks by the time their teacher came back. The tasks _________________________________________________ 4.Our heating isn’t working and I feel cold. If our heating _______________________________________________. 5. You can’t make a cake without flour. Unless ____________________________________________________. 6. The fire destroyed the forest completely. The forest __________________________________________________. 7.You must hurry or we'll miss the train. Unless we __________________________________________________. 8. People must not leave bicycles in the hall. Bicycles____________________________________________________.