（一）不能这样问.
1）人称代词后面是不能加冠词的,所以 a 不能放在 your 后面,应该把 a set of keys 放在 your 前面.
2）主语 a set of keys 是单数,所以不能用 are,要用 is.
此句应改成：Is this set of keys yours?
（二）两种回答都是正确的.
Are these your a set of keys?这个句子对吗,可以这样问吗,
5个回答
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