根据中文提示完成句子。

1. He has been a member of army _____. (十年了)

2. Alice will come back _____ (一周后)

3. His father has lived the countryside _____ (自从两年前)

4. Mike bought a computer _____ (三周前)

5. He had a traffic accident _____ (在一个下雨天的早上)

链条炉排每吨蒸汽所需炉排面积约为（）平方米。