问题
选择题
—_______ those your grandparents?
—No, _______.[ ]
A. Is, they are
B. Are, they are not
C. Is, it is
D. Are, it isn't
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—_______ those your grandparents?
—No, _______.[ ]
A. Is, they are
B. Are, they are not
C. Is, it is
D. Are, it isn't
答案：B
则An=______