these birds are fun (watch) there are many birds ( ) (sing)

these birds are fun (watch) there are many birds ( ) (sing) happily in the mountain
such 或so填空
( ) books have nothing fun
there is ( ) much rain in south china this year
it is ( ) rainy here this summer
the chinese have ( ) many friends across the world
it is ( ) funny a toy
it is ( )a　heavy　rain　
it　　rains　　　（　）hard
顺便帮我说一下such和so的用法
介词或副词填空
it is hard ( )a man to tell right from wrong
the soldiers have saved many people ( )　buildings　after　the　earthquake
in　the　futurethe　robot　will　get　my　breakfast　ready　when　i　wake　　（　）　in　the　morning