1. What is the passive voice of ‘Who did this‘?

[প্রাথমিক সহকারী শিক্ষক নিয়োগ ২০১৮ : 2018]

1. By whom this has been done?

1

2. Whon did this?

2

3. By whom was this done?

3

4. Who has done this?

4
Answer
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