it's very important______take fish out of water,______they will diea.to;or b.not to;when c.to not;or d.not to;or

it's very important______take fish out of water,______they will diea.to;or b.not to;when c.to not;or d.not to;or
it's very important______take fish out of water,______they will die
a.to;or b.not to;when c.to not;or d.not to;or

it's very important______take fish out of water,______they will diea.to;or b.not to;when c.to not;or d.not to;or
d to do 不定时的否定是not to do
or表示否则

D or是否则的意思