Напишите склонение этих слов срчно))))!!!!!!!

Туча,небо,звезда,солнце

complete the sentences with correct forms of the verbs

1)what will our panet look if we....... our nature?

A.didn't protect B.won't protect C.don't protect

2)what would he have done if his father ... rich?

A.wasn't B.hadn't been C.hasn't been

3)If I ... you,I would apologize first.