试题详情
— Have you ever worked as _______________ volunteer during the COVID-19 pandemic(新冠疫情)?
—Yes. It was _______________ unforgettable experience for me.
- A、an; an
- B、an; a
- C、a; an
- D、a; a
知识点
参考答案
采纳过本试题的试卷
—Yes. It was _______________ unforgettable experience for me.