题目内容：

完形填空，阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。

In 1930, a young African American, Vivien T. Thomas, a professional carpenter, was hired as a lab assistant by a famous white doctor named Dr. Alfred Blalock. Although he _________went to college, he had an enormous _________to learn and explore the power of knowledge. Whenever Dr. Blalock left his office, young Thomas used to _________ study the medical books on the shelves of the office.

Thomas _________ a great interest in learning more and more about _________ when he started to assist Blalock during his practice of surgeries on dogs. _________ Dr. Blalock understood Thomas’s ability to help him perform a complicated surgery; he still did not _________ Thomas as a smart person because of the social _________ of prejudice towards African Americans.

Dr. Blalock wanted to _________ to believe that Thomas was just a (n) _________ by profession and a lab assistant. Employees, white or black, at the hospital could not _________ that an African American, Thomas, could run the lab. He was the _________ and thus a history maker.

In those days, the society expected that black people were _________to be janitors (管理员). Despite this reality, Thomas’ cleverness, perseverance, and passion had _________ a need in Dr. Blalock’s mind. Thomas ran John Hopkins Hospital’s surgical (外科的) lab _________ Dr. Blalock. At the time, all other _________ employees in the hospital were janitors. Dr. Blalock and Thomas became a _________ and conducted a joint research that _________ the first heart surgery performed at John Hopkins University Hospital in 1941.

Many years later, Thomas’s contribution was _________ and he was eventually awarded an honorary doctorate, for his creative work in the _________ procedures of modern cardiac(心脏病的) surgery. As he became Dr. Thomas, he also inspired and lifted the confidence of the future generation. He used his knowledge for the betterment of humankind.

1.A. alwaysB. oftenC. occasionallyD. never

2.A. chanceB. desireC. incomeD. success

3.A. secretlyB. publiclyC. nervouslyD. proudly

4.A. discoveredB. avoidedC. developedD. protected

5.A. literatureB. medicineC. politicsD. history

6.A. WhileB. WhenC. AsD. Because

7.A. praiseB. rewardC. criticizeD. accept

8.A. benefitB. positionC. pressureD. revolution

9.A. agreeB. continueC. regretD. remember

10.A. carpenterB. professorC. engineerD. scientist

11.A. promiseB. argueC. explainD. understand

12.A. nextB. lastC. firstD. same

13.A. hardlyB. merelyC. luckilyD. mostly

14.A. createdB. searchedC. builtD. missed

15.A. overB. aboveC. withoutD. under

16.A. commonB. nobleC. blackD. poor

17.A. unitB. teamC. familyD. system

18.A. led toB. resulted from

C. accounted forD. gave up

19.A. changedB. followedC. exhibitedD. recognized

20.A. pioneeringB. surprisingC. interestingD. worrying