I picked up a paper at random through the headlines and put it where it had been . A. l

问题补充：

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

答案：

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。