A) 根据首字母或中文提示，写出正确的单词。
         is the most important thing while we are crossing the road. (安全)
The hall has ________ (出口) on its three sides.
The  _______(士兵 ) died in the war were honoured as the heroes of the country.
He has had his digital camera for _______ (超过) five years.
Before the project of Sanya , many ______(移民) left their hometown for their new living places.