问题
选择题
This is ______ "s" and that's ______ "u". [ ]
A. a, a
B. a, an
C. an, a
D. an, an
答案
答案：C
搜题请搜索小程序“爱下问搜题”
This is ______ "s" and that's ______ "u". [ ]
A. a, a
B. a, an
C. an, a
D. an, an
答案：C