To get a better view of the stage, .
A. our seats had to be changed.
B. our seats were changed
C. our seats are changed
D. we had to change our seats.
网友回答
A. our seats had to be changed.
B. our seats were changed
C. our seats are changed
(答案→)D. we had to change our seats.
解析：考查句子结构：非谓语动词（含现在分词/过去分词/不定式）做状语时，其逻辑主语一般都是句子的主语。而能做该句不定式to get a better view of the stage主语的，只能是人，而不能是物。由此一点，可以排除ABC（主语为物）。选D。