根据课文内容补全下列对话 W: I’d like to know about the two medicines—aspirin and penicillin. Could you please tell me something about them? M: I’ll be glad to. If you open up any medicine cupboard in the world, it is (1)l_______ that you will find aspirin and penicillin. Both of them have saved many people’s lives since they were invented. W: When was aspirin invented? M: I don’t know for sure, either. 3,500 years ago, people (2)c_________ on leaves or drank a kind of tea made from leaves (3)p________ a special chemical to reduce body pains and fever. In 1897, a European chemist produced ASA from some chemicals to make a medicine for his father. The first (4)t________ of this medicine took place in 1899 when the powder form began to be used with (5)p________. In 1900, it was sold in shops as a tablet which became the (6)b_______ medicine in the world for pain relief. W: Besides reducing fever and pain, what other functions does it have? M: It can also help reduce the risk of heart attacks and colon cancer and so on. W: What about penicillin? M: Penicillin was (7)d_______ by a Scottish scientist in 1928.He thought it might help in treating wounds and illness (8)c_____ by bacteria. But it was not until World War II that two other scientists managed to use new chemical techniques to (9)p________ it and then produced it in large (10)q________. Thanks to it, many lives were saved during World War II. It can also treat other illnesses including pneumonia. W: I’ve learned a lot today. Thank you. M: It’s a pleasure.