问题
选择题
In that country, the ____ are painted green. [ ]
A. boxes for letter
B. letter's boxes
C. letter boxes
D. letters' boxes
答案
答案：C
搜题请搜索小程序“爱下问搜题”
In that country, the ____ are painted green. [ ]
A. boxes for letter
B. letter's boxes
C. letter boxes
D. letters' boxes
答案：C