Question

If you see any litter on the school playground, you should ________.

A.pick up it B.put it up C.pick it up

Answer

C

【解析】

句意：如果你看见学校操场上有垃圾，你应该把它捡起来。

考查动词短语和代词位置。pick up it捡起来；put it up张贴；pick it up捡起。根据前文句意可知是要求捡垃圾，pick up是动词加副词组成的短语，代词需要放在中间，it是代词，需要放在词组中间。故选C。