Question

11. At last, we found ourselves at the foot of a hill with trees providing shade and     down to eat our picnic lunch.

A. sitting        B. having sat

C. to sit       D. sat

Answer 1

11.   D考查句法知识。句意：最后，我们发现我们自己身处山脚的树阴下，（然后就）坐下来吃野餐午饭。分析句子成分可知，and后所缺成分应为与found并列的谓语动词，而A、B、C三项均为非谓语动词形式.故选D。