三、完形填空（共20小題；每題1.5分，共30分。）
通讀下面的短文，掌握其大意。從每小題的四個選項中選出可填入相應空白出的最佳選擇，并把它前面的大寫字母填入左邊括弧里。
The common cold is familiar to everyone. People often catch cold in __31_ winter or spring. They may __32_ catch cold at other times __33_ the year. A person with __34_ bad cold usually buys some __35_ of medicine. Pharmacies have many __36_ for a cold. However， doctors __37_ that these medicines do not __38_ very much. They that __39_ person with a bad cold __40_ stay in bad， keep warm， and drink a lot of water. In 1928 an English doctor was working in his laboratory in London hospital. The doctor?s name _41_ Alexander Fleming. One day he _42_ a tiny bit of mold （黴） _43_ a dish that he was _44_ in his work. He started _45_ throw the mold away. Then _46_ noticed that it seemed unusual. He _47_ the mold and studied _48_ for a long time. He _49_ that it could kill germs. He _50_ it penicillin.
?。?）31.A. a B. the C. some D. none
?。?）32.A. too B. also C. to D. still
?。?）33.A. at B. from C. of D. on
?。?）34.A. some B. a C. one D. the
?。?）35.A. kind B. set C. quantity D. deal
?。?）36.A. medicine B. much C. medicines D. doctors
（ ）37.A. tell B. speak C. talk D. say
?。?）38.A. helps B. help C. helping D. helped
（ ）39.A. many B. some C. a D. one
?。?）40.A. ought B. shall C. to D. should
?。?）41.A. is B. was C. called D. be
?。?）42.A. finding B. founded C. found D. finds
?。?）43.A. in B. among C. above D. into
?。?）44.A. playing B. using C. cooking D. making
?。?）45.A. to B. and C. but D. by
?。?）46.A. she B. Dr C. it D. he
?。?）47.A. kept B. keeps C. keep D. keeping
?。?）48.A. them B. mold C. it D. him
（ ）49.A. knew B. studied C. invented D. discovered
?。?）50.A. calls B. named C. made D. liked
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