问题补充：
when the newspaper boy got to a blue door, , which frightened him away as fast as possible.
A. out a fierce dog rushed
B. out did a fierce dog rush
C. out rushed a fierce dog
D. rushed out a fierce dog
答案：
A. out a fierce dog rushed
B. out did a fierce dog rush
(答案→)C. out rushed a fierce dog
D. rushed out a fierce dog
解析：考查倒装句。副词out放在句首时，且主语为名词，应使用完全倒装，故选C out rushed a fierce dog，一条凶猛的狗跑出来。
