IV-Change into the active : 1. Chess could be played when I was young -……………………………………………………............................................................. 2. Her handbag was stolen on the train yesterday -…………………………………………………………………………………………… 3. English is spoke all over the world ………………………………………………………………….................................... 4. The house has been built of stone and cement -…………………………………………………………………………………………… 5. The report will not be done by the clerk ……………………………………………………………................................. 6. Was that book written by Mark Twin ? …………………………………………………………….................................. 7. That house should be bought immediately …………………………………………………………........................................ 8. America was discovered by Columbus in 1492 ……………………………………………………. 9. The whole village has been destroyed by the flood -…………………………………………………………………………………… 10.That room may be used for meeting place …………………………………………………………......................................... 11.This house was built 100 years go …………………………………………………………......................................... 12.These arfiticial (nhân tạo) flowers are made of silk ……………………………… 13.The lessons are being written by the students now. ………………………………………………...................................................... 14.This job has to be done at once. ………………………………………………………………………......................... 15.This operation is going to be performed by French doctors. - …………………………………………………………………………………........ 16.The animals at the zoo are fed twice a day. …………………………………………………………............................................... 17.How are candles (nến) made ? ………………………………………………………………………............................ 18.The results of the contest are going to be announced (thông báo) -…………………………………………………………………………………........... 19.Nothing moved until the police arrive. ………………………………………………………………........................................... 20.They couldn’t be found anywhere. ……………………………………………………………………...................................