he studied hard ONLY to fail in the exam 意思?

he studied hard ONLY to fail in the exam 意思? 英语句子：Mary studied hard only to fail in the exam. Jack studied very hard in order not to fail the final exam ( She studied hard in order to pass the exam She studied hard she studied hard in order to pass the exam =she studied hard he studied hard,the college entrance exam. He failed in the exam,and I wonder ___ he studied hard in th he worked hard but he still _____ in the final exam.填fail还是f he studied very hard( )he could pass the exam He was not the only one to A:fail the exam B to have failed To pass the mid-term exam,he studied very hard.开头为什么不可以用Pass He was not the only one to fail the exam 为什么是对的