Remember the book to the library when you finish it. A.to return;to read B.returning;rea

问题补充：

Remember the book to the library when you finish it.

A.to return;to read B.returning;reading

C.to return;reading C.returning;to read

答案：

解析： 本题的含义是当你把书看完，要记住把书归还给图书馆，finish doing sth为完成某事的意思，记住未做的事情翻译成remember to do，故本题选C。