(·北京高考)When we saw the road with snow we decided to spend the holiday at home.A. blo

问题补充：

(·北京高考)When we saw the road with snow, we decided to spend the holiday at home.

A. block

B. to block

C. blocking

D. blocked

答案：

A. block

B. to block

C. blocking

(答案→)D. blocked

解析：选D考查非谓语动词。句意：当我们看到道路被雪封住后，我们决定在家过假期。分析句子结构可知，此处是“see＋宾语＋宾语补足语”结构。宾语补足语是do形式时，表示“看见宾语做某事的全过程”；宾语补足语是doing形式时，表示“看见宾语正在做某事”；若宾语补足语与宾语是动宾关系时，则用过去分词形式作宾语补足语。road与block之间是被动关系，故选D。