1.His parents are fine.(对画线部分提问) 2.Are they your teachers?（肯定回答） ——3.This is my friend（复数句） 4.Those are cups.（单数句）5.These are her brothers.（否定句回答）
问题描述：
1.His parents are fine.(对画线部分提问) 2.Are they your teachers?（肯定回答） ——
3.This is my friend（复数句） 4.Those are cups.（单数句）
5.These are her brothers.（否定句回答）
答
1.How are his parents?
2.yes,they are.
3.these are my friends.
4.this is a cup.
5.these aren't her brothers.
答
How are his parents?
Yes,they are.
These are our friends.
That is a cup.
No,they aren't.
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答
How are his parents?
Yes,they are
These are my friends.
That is a cup.
These aren't her brothers.
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