请选择CBA0i+m4}+^6O)W.`4J ——What’s this? —— It’s _______ English book.8L-w(?7U/i,R*g
A. a8L-w(?7U/i,R*g
B. an8L-w(?7U/i,R*g
C. 不填8L-w(?7U/i,R*g