B4

Albert Schweitzer is known throughout the world for his missionary work in Africa. He was born on January 14, 1875 in Alsace, which was part of Germany and later Part of France after World War I.
(степень сравнения)

 LATE

B5

He was a talented person. By the age of thirty, he was known as an author, a lecturer, and a musician.
(past simple passive, он был известен)

 KNOW

B6

It was at this time that he learned of the great need of medical doctors in Africa. He decided to become a doctor of medicine. In 1913, Doctor Schweitzer and his wife left for Africa.
(past simple, прошедшая форма от leave)

 LEAVE

B7

The morning after the Schweitzers arrived, they started to treat their patients in an old farmhouse. However, a new hospital building was built with the help and the trust of African people.
(past simple passive, т.к. новая больница была построена, а не построила что-то сама)

BUILD

B8

Their work was interrupted by World War I Only in 1924, Dr. Schweitzer was finally able to return to Lambarene to rebuild the hospital. When Mrs. Schweitzer came back to Africa in 1929, the hospital was much larger.
(степень сравнения)

 LARGE

B9

There was a growing staff of doctors and nurses. In 1953 Dr. Schweitzer was given the Nobel Peace Prize.
(past simple passive, т.к. ему была дана премия, а не он дал  )

GIVE

B10

He was grateful, but said, 'No man has the right to pretend that he has worked enough for the cause of peace or declare himself satisfied.'
(present perfect, обратите внимание, что это цитата. Тесты построены по принципу, что необходимо выбрать наиболее подходящий вариант. В подобных высказываниях делается акцент на результат. Человек  уже работает и будет еще работать)

WORK