高中英语语法1.There are so many cars moving on the roads that it i

高中英语语法
1.There are so many cars moving on the roads that it is imposible to land a flying saucer without__smashed by one.
A.it is B.its C.being D.its being
为什么要选D 这样这句话怎么翻译
2.The problem that we are faced with right now is __of great urgency and so it needs our immediate attentiomn.
A.one B.some C.none D.that
选A urgency可数?