As a child Johnson would sit on the steps alone the sun down.A. watching; goB. watchin

问题补充：

As a child, Johnson would sit on the steps alone, the sun down.

A. watching; go

B. watching; went

C. watched; going

D. watched; went

答案：

(答案→)A. watching; go

B. watching; went

C. watched; going

D. watched; went

解析：考查非谓语动词：句意：当他是个孩子的时候，Johnson经常一个人坐在台阶上，看着太阳下山。第一空填watching是现在分词做伴随状语，表示主动关系，第二空是省略to的不定式做宾语补足语，词组是：watch +宾语+do，选A。