Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word for each of the blanks.
THE FIRST WOMAN SCIENTIST
Hypatia was born in Alexandria, in Egypt, in 370 A.D. For many centuries, she was (16) only woman scientist to have a place in the history books.
Hypatia's father was director of Alexandria University, and he (17) sure his daughter had the best education available. This was unusual, as most women then had few (18) to study.
After studying in Athens and Rome, Hypatia returned to Alexandria (19) she began teaching mathematics. She soon became famous (20) her knowledge of new ideas.
We have no copies of her book, (21) we know that she wrote several important mathematical works. Hypatia was also interested in technology and (22) several scientific tools to help with her work. At the (23) , many rulers were afraid of science, and (24) connected with it was in danger. One day in March 415, Hypatia (25) attacked in the street and killed.
Điền vào ô 23
A. time
B. day
C. period
D. year
Đáp án : A
Cụm “At the time”: lúc đó, khi ấy