Read the following passage and choose the best answer for each blank.
Many of the things we do (46) x on receiving information from other people. Catching a train, making a phone call and going to the cinema all involve information (47) x stored, processed and communicated. In the past this information had to be kept on paper (48) x , for example, books, newspapers and timetables. Now more and more information is put (49) x computers.
Computers play a role in our everyday lives, sometimes without us even realizing it. (50) x the use of computers in both shops and offices. Big shops have to deal with very large (51) x of information. They have to make sure that there are enough goods on the shelves for customers to buy, they need to be able to reorder before (52) x run out. A lot of office work in the past involved information on paper. Once it had been dealt with by people, the paper was (53) x for future reference. This way x of working was never (54) x easy or fast. A computer system is much more (55) x
Điền vào ô 49
A. by
B. in
C. with
D. on
Đáp án là D.
on computers: trên máy tính