语法问题At last, we found ourselves in a pleasant park with tree
语法问题
At last, we found ourselves in a pleasant park with trees providing shade and ________ down to eat our picnic lunch.
A. sitting B. having sat C. to sit D. sat
答案选D.这里为什么用过去式?是要跟found的形式一致吗?为什么sit不能做found并列宾语呢?
13.1