Nuclear waste will still remain / radioactive even after twenty thousand years, / so it must be disposed / of very carefully
Nulcear waste will still remain
radioactive even after twenty thousand years
so it must be disposed
of very carefully
of should be replaced with off.
disposed off means - throw away/ give away
My friend lived at the top / of an old house / which attic had been / converted into a flat
My friend lived at the top
of an old house
which attic had been
converted into a flat
which must be replaced with whose.
A public safety advertising / campaign in Russia / hope to draw attention / of pedestrians crossing the road
A public safety advertising
campaign in Russia
hope to draw attention
of pedestrians crossing the road
The subject here is public safety advertising which is singular. Hence the verb also has to be singular.
Hope should be replaced with hopes.
A cash prize / was award to the most / successful salesman of the year / by the president of the company
A cash prize
was award to the most
successful salesman of the year
by the president of the company
award should be replaced with awarded
The Renaissance was / a time to 're-awakening' / in both the arts / and the sciences
The Renaissance was
a time to 're-awakening'
in both the arts
and the sciences
to should be replaced with the preposition of
In times of crisis / the Bhagavad Gita gives light / and guide to the mind tortured by doubt / and torned by conflict of duties
In times of crisis
the Bhagavad Gita gives light
and guide to the mind tortured by doubt
and torned by conflict of duties
guide should be replaced with guidance
guide is the verb form; guidance is noun.
It was not easy for late Raja Ram Mohan Roy / to root out the custom of sati / because a majority of / the educated class does not support him
It was not easy for late Raja Ram Mohan Roy
to root out the custom of sati
because a majority of
the educated class does not support him
does should be replaced with did.
Because the entire sentence is in the past tense.
Deplete of the Ozone layer / and the greenhouse effect / are two long- term effects / of air pollution
Deplete of the Ozone layer
and the greenhouse effect
are two long- term effects
of air pollution
deplete should be replaced with depletion
because deplete is verb, depletion is noun.
Most of the people which / have been victims / of extreme violence / are too frightened to report it to the police
Most of the people which
have been victims
of extreme violence
are too frightened to report it to the police
which should be replaced with who
The doctor helps / to reducing human suffering / by curing diseases / and improving health
The doctor helps
to reducing human suffering
by curing diseases
and improving health
to should be replaced with the preposition in