Bị động với động từ khuyết thiếu

VII. Bị động với động từ khuyết thiếu
1. His experiment was carried out ten years ago.
 He.......................................................
2. They grow rice in the north.
 Rice...................................................
3. The postman was bitten by our dog.( to bite-bit-bitten: c3/4n, Rét)
 Our dog...........................................................
4. What did he write with it?
 What was................................................?
5. They will hold an international conference in Hanoi next month.
 An international....................................................
6. The Persian in vented windmills around 500 year ago.
 Windmills.....................................................
7. I'LL meet her at the airport.
 She.................................................................