Question

【题目】They drank tea and watched ________ opera at the teahouse yesterday afternoon.
A.a
B.an
C.the
D.不填

Answer 1

【答案】B
【解析】句意：他们昨天下午在茶馆喝茶，并看了一部歌剧。opera是元音读音开头的单词，故用an。所以选B。