You should give the book back to the library.(同义句) You should ---the book ---the library.

题目

You should give the book back to the library.(同义句) You should ---the book ---the library.

答案

很高兴为你解答.
保证正确率~!
正确答案是：
You should give the book back to the library.
= You should 【 return】the book 【 to 】the library.
你应该把书还给图书馆.
【解析】：
give back ...to = return ...to 把...还给
祝开心~!