are they和are these的区别

Are these的例句

Are these pictures level?

这些画挂齐了吗？

Are these newspaper reports true?

报纸上这些报道属实吗？

What are these shoes doing on my desk?

这些鞋怎么在我的书桌上呢？

Are these seats taken?

这些座位有人吗？

are they的例句

Are they teachers?

他们是老师吗？

Are they your cases?

它们是你的箱子吗？