第1个回答 2014-02-23
1. I am twelve years old.
Are you twelve years old?
Yes, I am.
No, I'm not
2. My mother is a worker.
Is your mother a worker?
Yes, she is.
No, she isn't.
3. These are red apples.
Are these red apples?
Yes, they are.
No, they aren't.
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