问题
选择题
．________ useful book is helpful to ________ artist.
A．An, an
B．A, a
C．A; an
D．An; a
答案
答案：C
搜题请搜索小程序“爱下问搜题”
．________ useful book is helpful to ________ artist.
A．An, an
B．A, a
C．A; an
D．An; a
答案：C
