问题
选择题
—Is this your backpack?
—Yes, _____. [ ]
A. this is
B. it is
C. it's
D. its
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—Is this your backpack?
—Yes, _____. [ ]
A. this is
B. it is
C. it's
D. its
答案：B
