It's necessary that........ A. we may protect the environment b. we can protect the environment c. we might protect the environment d. we should protect the environment

It's necessary that........

A. we may protect the environment

b. we can protect the environment

c. we might protect the environment

d. we should protect the environment

`-` It is necessary (+ for sb) + to V: cần thiết (cho ai) để làm gì
`-` It is necessary + that + S +(should)+ V: điều này cần thiết ai (nên) làm gì