问题
填空题
给出下列两个句子的肯定回答及否定回答。
1. Is this your pen?
肯定回答：_________________
否定回答：_________________
2. Is that your pencil?
肯定回答：_________________
否定回答：_________________
答案
1. Yes, it is. No, it isn't.
2. Yes, it is. No, it isn't.