Question

whom has done this work ❓ change the voice​

Answer 1

Explanation:

by whom the work has been done

Answer 2

By whom the work has been done?

Note:-

1. Always put question mark, exclamatory mark, etc. whenever required.

2. Never change the tense i.e. from present to past or past to future or future to present and vice versa.

3. Whenever Question comes with who or whom, start the sentence with By whom the .....

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