综合填空（共10空，计10分）
先通读下面的短文，掌握其大意，然后根据短文内容和所给首字母，在空格内填入一个适当的词，使短文意思完整。所填单词在题后横线上必须完整写出。
In most countries of the world,  there is one medicine called aspirin. N_________ everyone takes it. People take it when they have an ache or a pain,  and s ________when they have a fever(发烧) . Doctors b_________it can also help people who have heart disease and some other diseases,  too. Some people,  however,  cannot take aspirin. It must never be given to c_______under 12 years old.
Before aspirin was i_________ ,  some people made a drink with the bark( 树皮) of the white willow(柳树) . This drink made their pains and fever go away,  but no one knew w_________it helped. Then,  in the 1830s,  scientists in England s_________ all the things that were in the bark of the white willow. They found out what thing in the plant s_________ pain. Soon people were making medicine with this pain-stopping thing and selling it. Later scientists found out how to make aspirin w_________using any plants at all. Aspirin was first s_________in 1899 by the Bayer Company of Germany.