用thebeautyofnature还是beautifulnatureInordertoreducethedestructioncausedbyearthquakesandpromotethestudent'sself-helpskill为什么一个要用thedestructioncausedbyearthquakes一个要用student'sself-helpskill还有题

　　用thebeautyofnature还是beautifulnature

　　Inordertoreducethedestructioncausedbyearthquakesandpromotethestudent'sself-helpskill

　　为什么一个要用thedestructioncausedbyearthquakes一个要用student'sself-helpskill

　　还有题目也是

　　我怎么知道要用xx's还是ofxxx