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

答案及解析： C

解析：

此题题意是“你可以拿书架上任何一本书，但看完后请放回原处”．此题考查的是由put所构成的一些短语的区别和用法．put on穿上，上演；

put down放下，记上；

put back放回；

put off推迟．