Подчеркните оборот (инфинитивный, причастный, герундиальный) и укажите какой: Medicines, when used appropriately, are on of the most cost-effective health care interventions. 3. It is important to start treatment at the early stage of disease. 4. They succeeded in obtaining reliable results in surgery. 5. Many unexpected adverse reactions occuring in a small percentage of persons exposed to a drug can be explained as a genetically determined abnormal reactivity to a drug. 7. With technology having reached a high stage of development, new methods of work became possible.