[1.This`s 2.this is 3.that]a book.
问题描述:
[1.This`s 2.this is 3.that]a book.
答
This is(没有THis's的缩写,That少了is,is解释为"是")
[1.This`s 2.this is 3.that]a book.
This is(没有THis's的缩写,That少了is,is解释为"是")