I 1..............................( always be) very fit and healthy, and I 2________________ (never have) a serious illness. However, a couple of weeks ago , I 3_____________(catch) the flu. I 4__________________ (have) a high temperature for nearly a week and my whole body hurt. I don’t think I 5_____________ (never feel) so miserable. It’s taking me ages to get my strength back. It really bothers me that I 6________________(not have) enough energy to play football since I got ill. In fact, I 7________________(already be)to the doctor to ask if it’s normal to feel weak for so long. He says I’ll soon feel better. Apparently I’m lucky. For some people, especially the old and the weak, the flu can be very serious. Doctors 8____________________(try ) for years to find a cure for the flu, but they 9 _________________( not find)one yet . Fortunately, researchers 10____________________(develop) a vaccine which gives effective protection against the disease. According to my doctor, most of his elderly patients 10.............................. (receive already) their flu shots.