When we saw the roadwith snow we decided to spend the holiday at home. A. blockB. to bloc

问题补充：

When we saw the roadwith 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：根据句子结构可知，此处的block是非谓语，作road的宾语补足语，而同时road和block之前存在着被动关系，因此选择D项，句意为，当我们看到路被大雪挡住的时候，我们决定这个假期就呆在家里了。

【考点定位】考察非谓语动词。