誰があなた方を喜ばせたのか? → 1. Who(S) pleased(V) you(O)? 2. Who(S) made(V) you(O) happy(C)?
受動態:
1. Who were you(S) pleased(V) by? / By whom were you pleased?
2. Who were you(S) made(V) happy(C) by? / By whom were you made happy? ※どちらでもOKです
参考にしてください。
You're welcome!
ありがとうございます😭