问题
选择题
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
A
题目分析：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。