问题
选择题
This is __________ paper. This is __________ pen.[ ]
A. a, a
B. /, a
C. a, /
答案
答案：B
搜题请搜索小程序“爱下问搜题”
This is __________ paper. This is __________ pen.[ ]
A. a, a
B. /, a
C. a, /
答案：B