Question

Add the agent to the sentence using prepositions by or with

Bread is cut ... a knife
She was introduced to the manager...the secretary.
In winter rivers and lakes are covered...ice.
Some flour, eggs, salt, sugar and milk were beaten...a mixer.

Answer 1

1. with

2.by

3. with

4. with
_______________

with—если неодушевленный предмет, by—одушевлённое лицо