Bantu jawab donk kalimat aktif menjadi kalimat pasif Dan kalimat pasif menjadi aktif

B. No 1 = omar was writer the sentence.

Sorry if there's any mistakes.
A.
1) The customers were served by the waitresses and waiters.
2) Ann was invited to the party by Bill
OR 
Ann was invited by Bill to the party
3) Did the course taught by Prof. Jackson?
B.
1) Omar write that sentence
2) Did Thomas Edison invent the electric bulb?

Untuk memasifkan kalimat,
Objek yg berada di dalam kalimat aktif menjadi subjek yg berada di kalimat pasif. Dalam B.Inggris, kita menggunakan "By" untuk memasifkan.