Mark a letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the following questions.
_______ of computers, it is difficult to imagine how tedious the work of accountants and clerks must have been in the past.
A.At the age
B.On the age
C.In the age
D.By the age
Answer the question before viewing the answer below
Correct answer: C
– At the age of + số tuổi: ở độ tuổi bao nhiêu