1. The polluted water resulted in the death of many aquatic animals and plants.

2. The sand of the beach was being slowly covered with oil.

3. He denied being there at the time.

4. Graham has devoted all his time to doing research.

5. Is there any chance of Peter changing his mind?" Rob asked

1. Many aquatic animals and plants died because the water was polluted

→The polluted water resulted in the death of many aquatic animals and plants

2.Oil was slowly covering the sand of the beach

→The sand of the beach was being slowly covered with oil.

3. " I wasn't there at the time " he said

→He denied having been there at the time.

4.Graham spends all his time doing research

→Graham has devoted all his time to doing research.

5. " Is Peter likely to change his mind ? " Rob asked

→Is there any chance of Peter changing his mind?