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

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

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

20、选B。A、C不合逻辑，D不合语境。

(十四)

Charles R. Drew was a medical student at Columbia University in New York. Before he graduated, he wrote an article 1_____ blood bank, that is, the storing of blood. Up till then, a lot of people had died from loss of blood 2_____ there was no blood bank.

When the United States entered the Second World War, it became 3_____ to set up blood banks. Dr Drew became 4_____ of the red cross’s first blood bank. When the Red Cross 5_____ blood banks to collect and store blood for men 6____ in battle, black American gave blood along with the whites. At 7_____ their blood was not accepted. Later blood from the blacks was 8______ but was stored in a 9_____ place from “white” blood. Although the best doctors 10_____ that there was 11_____ difference at all between the blood of blacks and whites, the Red Cross, with the support of the government, 12_____ to separate black blood from white blood.

After the war, Dr Drew was 13_____ from Washington with three other doctors to attend a medical meeting in a southern state. In northern Carolina their car went 14_____ a ditch(深沟)and Dr Drew was 15_____ hurt. He had lost 16____ blood by the time a passing car took him to the 17_____ hospital. But they were stopped at the gate of the hospital. “18____him to the hospital for blacks.” No matter 19_____ they said, they could not get into the hospital. They had to take him to the 20_____ hospital, but on the way Dr Drew died because he had lost too much blood.

19、选A。B、C不合情和逻辑，D与本文无关，只有A合乎语境。

18、选C。这里的waiting用作及物动词，意为“期待”。B(looking)不及物，不能

带宾语，A、D不合文意，这三项不能选用。

17、选D。proved(后来证明是)，stayed(保持)不合文意。called意为“称呼，把……

叫做”，这里须在其前面加上be动词才合乎逻辑。

16、选B。从she looked at her parents…中可得到暗示。

15、选A。从Mrs Dunn的话中可知，她全家都“爱”Alexandra。

14、选C。从after their meal可知，他们去的是“饭店”。