Atlast,wefoundourselvesinapleasa?
At last, we found ourselves in a pleasant park wh trees providing shade and ______ down to eat our picnic lunch.   A. sitting       B. having sat      C. to sit      D. sat A和D有什么区别?我觉得A也行啊,请详细讲解
D. and是连词.并列两个谓语.and前的谓语是found.所以and后的谓语也要用一般过去时.with trees providing shade 做定语