I may clean the house.
MIGHT
The house may be cleaned.
MIGHT BE+V3
i might clean the house.
HAVE TO
The house might be cleaned.
HAVE TO BE +V3
I have to clean the house.
The house has to be cleaned.
People (/are told) not to spend much time in di-
Water in many rivers nowadays (is polluted).
Rivers and oceans (are used) as dumps, which
Fish and reptiles can't live in many rivers and lakes
ich shows that they (will be poisoned).
Factories and plants often (pour) their
Poisoned fish (may be eaten) by people
To make the air clean we (need) good fil-
Nuclear-poisoned fish (might be eaten), which
Nuclear pollution (can't be seen).
What (caused) this awful destruction?
