问题
选择题
Thank you, Mary. It's really _____ useful information for all of us. [ ]
A. a
B. an
C. 不填
D. the
答案
答案：C
搜题请搜索小程序“爱下问搜题”
Thank you, Mary. It's really _____ useful information for all of us. [ ]
A. a
B. an
C. 不填
D. the
答案：C