句型转换。Whose guitar is this? (改为同义句)
_________ _________ the guitar belong to? Jack used to be an outgoing pianist. ( 改为一般疑问句)
_________ Jack _________ to be an outgoing pianist? Jennifer is worried because of her poor English. (对划线部分提问)
_________ __________ Jennifer worried? Your brother has never heard of the story, __________ ____________? (完成反意疑问句)
I think parents should be strict with teenagers. ( 改为否定句)
I_______ ________ parents should be strict with teenagers.