Mary often stays up, reviewing her lessons, books all over the desk.
A. spreading
B. spread
C. are spreading
D. to spread
网友回答
A. spreading
(答案→)B. spread
C. are spreading
D. to spread
解析：句意：玛丽经常熬夜复习功课，书摊了一桌子。这里整句话没有连词，reviewing是非谓语动词，它与Mary是主动关系；books spread all over the desk这是独立主格结构，books与spread之间是被动关系，故spread是过去分词；故选B。