— Have you ever worked as _______________ volunteer during the COVID-19 pandemic(新冠疫情)? —Yes. It was _______________ u

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1. (2020九上·来宾月考) — 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

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广西来宾市2020-2021学年九年级上学期英语第四次月考试卷