The common cold is familiar to everyone. People often catch cold in __1_ winter or spring. They may __2_ catch cold at other times __3_ the year. A person with __4_ bad cold usually buys some __5_ of medicine. Pharmacies have many __6_ for a cold. However， doctors __7_ that these medicines do not __8_ very much. They that __9_ person with a bad cold __10_ stay in bad， keep warm， and drink a lot of water.

　　In 1928 an English doctor was working in his laboratory in <<<>>> hospital. The doctor‘s name _11_ Alexander Fleming. One day he _12_ a tiny bit of mold (黴) _13_ a dish that he was _14_ in his work. He started _15_ throw the mold away. Then _16_ noticed that it seemed unusual. He _17_ the mold and studied _18_ for a long time. He _19_ that it could kill germs. He _20_ it penicillin.

　　( )1.A. a B. the C. some D. none

　　( )2.A. too B. also C. to D. still

　　( )3.A. at B. from C. of D. on

　　( )4.A. some B. a C. one D. the

　　( )5.A. kind B. set C. quantity D. deal

　　( )6.A. medicine B. much C. medicines D. doctors

　　( )7.A. tell B. speak C. talk D. say

　　( )8.A. helps B. help C. helping D. helped

　　( )9.A. many B. some C. a D. one

　　( )10.A. ought B. shall C. to D. should

　　( )11.A. is B. was C. called D. be

　　( )12.A. finding B. founded C. found D. finds

　　( )13.A. in B. among C. above D. into

　　( )14.A. playing B. using C. cooking D. making

　　( )15.A. to B. and C. but D. by

　　( )16.A. she B. Dr C. it D. he

　　( )17.A. kept B. keeps C. keep D. keeping

　　( )18.A. them B. mold C. it D. him

　　( )19.A. knew B. studied C. invented D. discovered

　　( )20.A. calls B. named C. made D. liked

　　参考答案：

　　1.B 2.B 3.C 4.B 5.A 6.C 7.D

　　8.B 9.C 10.D 11.B 12.C 13.A 14.B

　　15.A 16.D 17.A 18.C 19.D 20.B