【题目】The palace is heavily guarded, because inside its walls ________.
A. where sit the European leaders B. the European leaders there sit
C. sit the European leaders D. that the European leaders sit
在线课程【答案】
【解析】试题句意：宫殿守卫森严，因为墙里面坐着欧洲的领导人。这里inside its walls是地点状语，后面用完全倒装，谓语提到主语前面，选C。