Charles R.Drew was a medical student at Columbia University in New York.Before he graduated, he wrote an article 21_____ blood bank, that is, the storing of blood.Up till then, a lot of people had died from loss of blood 22_____ there was no blood bank.

When the United States entered the Second World War, it became 23_____ to set up blood banks.Dr Drew became 24_____ of the red cross’s first blood bank.When the Red Cross 25_____ blood banks to collect and store blood for men 26____ in battle, black American gave blood along with the whites.At 27_____ their blood was not accepted.Later blood from the blacks was 28______ but was stored in a 29_____ place from “white” blood.Although the best doctors 30_____ that there was 31_____ difference at all between the blood of blacks and whites, the Red Cross, with the support of the government, 32_____ to separate black blood from white blood.

After the war, Dr Drew was33_____ from Washington with three other doctors to attend a medical meeting in a southern state.In northern Carolina their car went 34_____ a ditch(深沟)and Dr Drew was 35_____ hurt.He had lost 36____ blood by the time a passing car took him to the 37_____ hospital.But they were stopped at the gate of the hospital.“38____him to the hospital for blacks.” No matter 39_____ they said, they could not get into the hospital.They had to take him to the 40_____ hospital, but on the way Dr Drew died because he had lost too much blood.

21.A.of          B.on          C.for           D.in

22.A.though        B.if           C.because         D.and

23.A.possible        B.impossible        C.important        D.necessary

24.A.visitor          B.head         C.receiver        D.supporter

25.A.started         B.expected        C.promised        D.forbade

26.A.died          B.killed          C.wounded        D.fighting

27.A.most         B.least          C.first           D.last

28.A.received        B.accepted        C.lost          D.found

29.A.good         B.cool          C.hot          D.separate

30.A.discovered       B.invented        C.insisted         D.regretted

31.A.little          B.much         C.some         D.no

32.A.began         B.refused         C.stopped         D.continued

33.A.driving         B.walking         C.arriving         D.traveling

34.A.from         B.into          C.along          D.off

35.A.hardly         B.nearly         C.badly          D.not

36.A.some         B.little           C.all           D.much

37.A.biggest         B.most modern      C.nearest         D.cheapest

38.A.Take         B.Bring          C.Send for       D.Find

39.A.how          B.what         C.where        D.who

40.A.colored         B.better         C.farthest        D.same

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