根据句意和汉语提示写出单词，完成句子。
The dry weather in Southeast China has been the main _________(原因) of the forest fires in the area since last autumn.
Few people live ________(超出) the age of one hundred.
________(升起) the national flag is one of the most important events in our school every week.
My cousin is a ___________ (心灵手巧的) boy. He always pays attention to details.
Human beings want to move to Mars because the Earth is getting too _____( 拥挤).