问题
选择题
This is _____ apple and that is _____ pen.[ ]
A. an, a
B. a, an
C. an, an
D. a, a
答案
答案：A
搜题请搜索小程序“爱下问搜题”
This is _____ apple and that is _____ pen.[ ]
A. an, a
B. a, an
C. an, an
D. a, a
答案：A