I picked up a paper at random , through the headlines and put it where it had been .
A. looking
B. looked
C. to look
D. and looked
网友回答
A. looking
(答案→)B. looked
C. to look
D. and looked
解析：考查并列的谓语。句意：我随意拿起一张报纸，浏览了一下标题，放回了又来的位置。根据题中的谓语picked up，此空与and put是并列的动作，所以用过去式，选B。