作业帮he was not able to pass the exam.=he ---- ----passing the exam.
来源：学生作业帮助网 编辑：作业帮 时间：2024/06/14 03:37:21
he was not able to pass the exam.=he ---- ----passing the exam.
He failed in passing the exam
不能，be able to do sth 没有 be able doing sth。这里后面是“passing the exam”。