词汇运用（本题有10小题， 每小题1分，共10分） 阅读短文，根据中文填写适当的单词，使意思完整，每空一词。 People are often killed while crossing the road. Most of __ _1___ _ (他们) are old people and children. Old people are often killed because they usually can’t see or hear very  well . Children are often killed because they are ___ _2_ ___(粗心的). People should __ _3_ _ _（看）and listen before they cross the road.  A car, truck _ _4 ____（或者） bus can’t stop very quickly if it is going very fast. It will travel many ____ 5_ __(米) before it stops. People don’t always know this. They think a car can stop right away. The faster a car is traveling, the ___ 6_ __(长的) it takes to stop. It’s ___ 7 ___ （困难的）for a person to know how fast a car is traveling. The only safe way to __ _8 _____(穿过) the road is to look at both ways, right and __ _9 ___（左边） .The correct way to cross the road is to walk quickly when the traffic ____10____（灯） turn green. It’s not safe to run.