第一个问题:Yes, he is./ No, he isn't.
第二个问题:Yes, he is. /No, he isn't.
第三个问题:Yes, it is./ No, it isn't.
1. Is your brother Mike?
Yes, he is.
No, he isn't.
2. Is Mike your brother?
Yes, he is.
No, he isn't.
3. Is this your brother?
Yes, he is.
No, he isn't.
第一个问题:A
第二个问题:A
第三个问题:B
yes,he is
it is