问题
选择题
A: Where ________ their books ?
B: Sorry , I don't know . [ ]
A. is
B. am
C. are
答案
答案：C
搜题请搜索小程序“爱下问搜题”
A: Where ________ their books ?
B: Sorry , I don't know . [ ]
A. is
B. am
C. are
答案：C