Hello!That is my friend,Lily.这句话错在哪里?怎么改?-What's this?-This is a book.还有这句。

问题描述:

Hello!That is my friend,Lily.这句话错在哪里?怎么改?
-What's this?
-This is a book.还有这句。

This is my … 另一句改成It's a book.

That改成This,介绍时说的。

Hello!This is my friend,Lily
-What's this?
-It is a book.

This is~~