在横线上填入（“＞”、“＜”或“＝”）

$\frac{8}{15}-\frac{3}{15}$  ____  $\frac{2}{5}$

$\frac{7}{12}+\frac{7}{12}$ ____ $1\frac{1}{6}$

    Hello！My name is Jim. I am from England. But now I'm in Guangdong, China. I am in 1 I'm in No. 5Middle School. The weather here is 2 in summer. I often swim in the river in the afternoon. I like swimming 3.4is good for us. I like playing football,5 I can play football very well. After school I play 6 with my classmates. And I often 7 football games on TV. My friend, Kitty, is from the US.  She8 singing very much. She can sing very well. We all like listening to9songs. In music class she often sings songs. Our 10 teacher likes her very much. She says Kitty can be a good singer in the future.

I don't like doing the dishes because it's ____ .

春秋战国时期发生社会大变革的根本原因是 （   ）