The books must[ ]return to the library on time A give back B take C return D be returned选什么,求.The books must[ ]the library on time A give back B take C return D be returned

问题描述:

The books must[ ]return to the library on time A give back B take C return D be returned
选什么,求.
The books must[ ]the library on time A give back B take C return D be returned

D be returned
这本书必须按时归还图书馆
书应该是被归还,要用被动,所以D