are they english books yes they are

B 分 析： 句意：这些都是你的英语书吗？------是的，它们都是。根据一般疑问句回答的原则，肯定回答一般不缩写，而且要使用代词，即：Yes ，they are.，故选B。 考点： 考查一般疑问句的简略回答

扩展阅读：you are welcome ... themselves ... because of you ... they arent very busy ... are they your ... garbage sorting ... they all live together ... they are fun ... they are american ...