The key to exercise solutions in chapter 10 - Grammar for the textbook New Headway Pre-Intermediate - Workbook with authors Liz Soars, John Soars and Paul Hancock from Oxford University Press
Question
Correct the sentences.
Answer
No, they weren't! Animal skins were used.
No, it wasn't! It was invented by a Chinese government official.
No, it wasn't! It was brought to Europe by the Arabs.
No, it hasn't! It has been made out of woof for more than 300 years. / It has been made out of wood since the 18th century.