一、课前自主预习——课文重建
根据本单元reading 课文在下面短文空格中填入所缺单词（每空一词）。
Another drug that has helped ___1_____ the standard of people’s health is penicillin, which is considered by many to be one of the most important medicines in _2________ society. It was discovered by a Scottish scientist 3________ Alexander Fleming in 1928. He noted that a dish in which he was trying to grow 4__________ for an experiment looked 5__________ _____there was blue mould in it. It 6__________ him to see the bacteria surrounding the mould dead, which meant that the mould had killed them. Fleming 7________ this mould 8______ on another bacterium and found that it killed the bacterium too. He immediately realized that the mould might have an 9__________ in treating illness caused by bacteria. He named the liquid made from the mound ‘ penicillin’. However, he was 10_______ to find a procedure to make penicillin pure enough to work as a medicine.
