2. Alexander Fleming discovered penicillin and received the Nobel Prize in 1945. Penicillin Penicillin ………………………………………………………………………… 3. The last time my father played tennis was in 1999. My father has …..………………...................................................................................... 4. Bob is the most intelligent student in our class. Nobody………………..………………...................................................................................... 5. Helen likes camping on the pasture. Helen is ………………………...................................................................................... 6. They reported that the climbers got lost. The climbers ……….………………...................................................................................... 7. Watching an international football match is wonderful. I find ……………………...................................................................................... 8. John asked the worker to repair the roof. John had a ………………………………...................................................................................... 9. His parents always make him study hard. He …………..………………...................................................................................... 10. Nam is the best player in our school team. No one ……………..………………......................................................................................