在下列各句的空格内填上一个适当的完整的单词，该词的首字母已给出。
1. Tony is really p____. He keeps waiting outside the house for almost three hours.
2. The f____  stood on the board, laughing happily, because they caught lots of fish this time.
3. When I heard of my grandma's d____, I couldn't help crying.
4.Parents hope their children can do best in the class, so they usually e____  too much of their children.
5. There is nothing in the box. It's e____ 

循环节长度为2的循环小数0.$\stackrel{.}{a}\stackrel{.}{b}$可以表示成0.$\stackrel{.}{a}\stackrel{.}{b}$=，若P=0.$\stackrel{.}{a}\stackrel{.}{b}$×2009，且P的小数部分是0.$\stackrel{.}{1}\stackrel{.}{2}$，则0.$\stackrel{.}{a}\stackrel{.}{b}$=____ ．

我国第一级阶梯与第二级阶梯的地理界线是（　　）

选择正确的读音。

行走（xíng háng）____干净（gān，gàn）____   禁不住（jìn,jīn）____

行列（xíng háng）____    干活（gān，gàn）____   禁止（jìn,jīn）____

安史之乱，对社会经济造成极大的破坏，导致了唐朝的灭亡。（   ）