新英语四级改错练习题及答案精选一

　　Americans this year will swallow 15000 tons ofaspirin, one of safest and most effective drugs 1.__________invented by man. The most popular medicines in the 2.__________world today, it is an effective pain reliever. Its badeffects are relatively mild, and it is cheap.

　　For millions of people suffered from arthrities, 3.__________it is the only thing that works. Aspirin, in short, istruly the 20th-century wonder drug. It is also thesecond largest suicide drug and is the leading cause ofpoisoning among children. it has side effects that, if 4.__________relatively mild, are largely unrecognized between users. 5.__________Although aspirin was first sold by Germam companyin 1899, it has been around much longer than that.

　　Hippocrates, in ancient Greece, understood the medical valueof the leaves and tree bark which today is known to 6.__________contain salicylates, the chemical in aspirin. during the19th century, there was a great number of experimentation 7.__________in Europe with this chemical, and it led in the introduction 8.__________of aspirin. By 1915, aspirin tablets were availablein the United States.

　　A small quantity of aspirin

　　relieves pain and inflammation. It also reduces down 9.__________fever by interfering with some of the bodys reactions.

　　Specifically, aspirin seems to slow down the formationof the acids involved in pain and the complex chemicalreactions that cause fever. The chemistry of these acidsis not fully understood, and the slowing effect of aspirin 10.__________is well known.

　　参考答案

　　1. of safest the

　　2. medicines medicine

　　3. suffered suffering

　　4. if though

　　5. between among

　　6. is are

　　7. number deal

　　8. in to

　　9. down /

　　10. and but