题目内容
— 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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题目内容
— 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