Passive and active voice

i. переведите на язык, употребляя глаголы в past / present/ future simple active или passive.
они написали — им написали (to write)
мы пригласим – нас пригласят (to invite)
я навещаю – меня навещают (to visit)
он посоветовал — ему посоветовали (to advise)
ii. переведите на язык, употребляя глаголы в present, past, future simple simple passive.
нам - нам — нам (to help)

вас лечат - вас вылечили - вас вылечат (to treat)

iii. напишите номера предложений, употребленных в страдательном залоге
these drugs are effective.
we answered the question.
hockey is played in winter.
my sister sold her flat last month.
many houses disappeared during the great fire of london.
he will finish a new book next year.
flowers are sold in shops and in the streets.
st. petersburg was founded in 1703.
my question was answered yesterday.
he was taken to hospital by an ambulance

iv. употребите предложения в страдательном залоге.

my friends invited me to a concert last sunday.
the doctor cures his patient effectively.

v. употребите предложения в действительном залоге.
these apple-trees were planted by my granny last spring.
her brother will be cured by a very skillful doctor