把下列句子由单数变为复数或由复数变为单数.1、This is a book.2、That is a box.3、Are those_英语解答

把下列句子由单数变为复数或由复数变为单数.1、This is a book.2、That is a box.
3、Are those rulers?4、What are these.5、They are toys

人气：141 ℃　时间：2019-10-04 06:48:41

解答

These are books.

Those are boxes.

Is that a ruler ?

What's this ?

It's a toy.