英语求助英语 1.改成疑问句并作肯定否定回答 1 that is a yellow ruler these are her erasers those are
问题描述：
英语求助英语 1.改成疑问句并作肯定否定回答 1 that is a yellow ruler these are her erasers those are
答
Is that a yellow ruler
Yes,it is .
No,it isn't.
Are these her erasers
Yes,they are.
No,they aren't.