___ of computers, it is difficult to imagine how tedious the work of accountants and clerks must have been in the past.

Câu hỏi :

 ___ 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

* Đáp án

C

* Hướng dẫn giải

Phương pháp giải:

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