Coffee is one of the most popular drinks around the world. ____  (1)  ____ Experts think that there are more flavors of coffee than there are of wine. Coffee contains caffeine, something that raises our awareness, keeps us from falling asleep or simply gives us a kick in the morning or after lunch.

   ____  (2)  ____ For a long time doctors have told people not to drink too much coffee, because it may lead to heart problems, high blood pressure, and headaches.

   Scientists have now found out that it is the quality of coffee and the way it is made that hold the key to our health. ____  (3)  ____ Among other things, this is linked to the consumption of a strong coffee. Experts also point out that different roasts and types of coffee beans have different effects on our health. Milk and sugar change the different levels of caffeine in a cup of coffee.

   A new study by a Harvard research group says that there is no link between coffee and health problems. Drinking several cups of strong coffee a day is not connected with early death or other heart diseases. Coffee has many advantages, as the new study suggests. While alcohol makes people sleepy and slow moving, coffee gives them energy. ____  (4)  ____

   Although a lot still needs to be uncovered about coffee, it seems to reduce the risk of cancer and diabetes (糖尿病). ____  (5)  ____ But reports show that people who drink coffee may develop Parkinson's disease later in life, or maybe not at all.