第1个回答 2012-10-15
Is this your friend?
No, he(she) isn't.本回答被提问者采纳
第2个回答 2012-10-15
Is this your friend?
No, this (/he/she) isn't.
第3个回答 2012-10-15
is this your friend?
Yes,this is
No,this isn't
第4个回答 2012-10-15
Is this your friend?
No, this (/he/she) isn't.