You can take anything from the shelf and read, but please the books when you’ve finished with them.
A. put on
B. put down
C. put back
D. put off
网友回答
A. put on
B. put down
(答案→)C. put back
D. put off
解析：句意，你可以从这个架子上拿任何书来阅读，但是请读完之后，把书放回原位。put on穿上put down放下put back放回原处put off推迟，根据题意，故选C。