1. She often helps other children. (改为被动语态) Other children _____ _____ by her. 2. Harry Potter was written by J.K.Rowling. (改为一般疑问句) _____ Harry Potter _____ J .K. Rowling ? 3. Betty will be invited to the party this evening. (改为否定句) Betty _____ _____ _____ to the party this evening. 4. Some vegetables were bought at the morning market. (对画线部分提问) _____ _____ some vegetables _____? 5. He was so interested in the field of computer science that he couldn't stop his study. (改为同义句) He was _____ _____ in the field of computer science __________ his study.