Use the right preposition by for or in

Question

Use the right preposition by for or in

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Comments

что написано в конце предложения 6 в задании 5?

Answer 1

5

1) in

2) by

3) for

4) in

5) for

6) не видно слово в конце

6

1) discovered

2) decreased

3) operate

4) technology

5) research

6) effect

7) involves