John passed the exam,although he didn't study very much for

John passed the exam,although he didn't study very much for didn't study hard.He is _____ failing the exam. He didn" t pass the exam ( ) he didn" t study hard. He didn't pass the exam because he didn't study hard.(对划线部分提 He didn't know if he had passed the exam.这句话从语法上来讲对吗?didn't The lazy boy didn't study hard ,so he falied the last exam.( Tom worked very hard and f( ) he passed the exam. They all passed the exam,but I didn't.They all passed the ex The boy felt very __ because he didn't pass the exam.A sadly __(luck)for him,he has passed the exam what surprised us very much that he had passed the driving t ___________.he passed the exam.