改错1.He studied very hard .and at the end he passed the exam.

改错1.He studied very hard .and at the end he passed the exam. Tom worked very hard and f( ) he passed the exam. he studied very hard( )he could pass the exam （ ）,he would have passed the exam.A.If he studied hard B.Had he studied hard,the college entrance exam. Tom studied hard and passed the English exam (容易). he worked hard,___he passed the exam. He failed in the exam,and I wonder ___ he studied hard in th To pass the mid-term exam,he studied very hard.开头为什么不可以用Pass he studied hard,aiming at passing the exam.为什么aim要加ing?请详解. he studied hard ONLY to fail in the exam 意思? He passed the final exam ( ) (success) because of this hard