I am afraid my help ____ you much. A: availed B: didn't avail C: was not available D: was an available

When cooperating with the American specialists in the States, I （） myself of the opportunity to improve my English. A: availed B: allowed C: deprived D: indulged

All the efforts [color=#ff3853]availed[/color] us nothing. A: v. 各不相同；变化 B: v. 有益于；有益于；使对某人有利 C: v. 通勤；减刑 未知类型：{'label': 'source', 'content': '', 'isMemberControl': 0, 'type': 181}