单选题At the sight of the&

问题补充：

单选题Atthesightofthepoliceman_____frombehindthedoor.A.did the boy rushed outB.rushing out was the boyC.out rushed the boyD.the boy was rushing out

答案：

C解析句意：一看到警察这个小男孩从后门就跑了出去。考查：副词放在句首时，使用完全倒装。