【正文】
。 ? bacterium, bacterial Words that are pound words: ? painkiller ? bloodthinning ? heart attack ? acetylsalicylic Words with irregular plural forms: ? bacteria ? bacterium Consolidation Fill in the blanks with proper words according to the reading material. 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? ikely 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 fo