Complete the passage with suitable words.

I 1.............................. always been very fit and healthy, and I have 2.............................. had a serious illness.

However, a couple of weeks 3.............................. , I caught the flu. I must admit that until then, I

4.............................. not realised just how unpleasant the flu could be. I had a high temperature for nearly a

week, and my whole body hurt. I don’t think I have 5.............................. felt so miserable. It’s taking me ages to

get my strength back. It really bothers me that I haven’t had enough energy to play football 6..............................

I got ill. In fact, I have 7.............................. been 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 have tried 8.............................. years to find a cure for the flu, but they haven’t found one

9............................... . Fortunately, researchers have developed a vaccine which gives effective protection against

the disease. According to my doctor, most of his elderly patients have 10.............................. received their flu​