问题
选择题
Seeing the road ________ with snow, they had to stay at home, watching TV and drinking coffee.
A．blocking
B．blocked
C．to block
D．to be blocked
答案
答案：B
考查非谓语动词。句意：看到公路被大雪堵住了，他们不得不呆在家，看电视喝咖啡。过去分词作补足语表示被动的动作，和被修饰词是动宾关系。结合语境可知选B。