I'm looking for a "teacher" to correct these exercises.... Thanks!

Change the following sentences into passive sentences using the words in brackets.
a. We sell tickets for all shows at the Box Office. (Tickets for all shows/sell/at the Box Office)
Tickets for all shows are sold at the box office
b. Thomas Edison invented the electric light bulb. (The electric light bulb/invent/by Thomas Edison)
The electric light bulb was invented by Thomas edison
c. Someone painted the office last week. (The office/paint/last week)
The office was painted last week
d. Several people saw the accident. (The accident/see/by several people)
The accident were was seen by several people
e. Where do they make these video recorders? (Where/these video recorders/make)
Where are these video recorders are made?
Rewrite these sentences in the passive voice.

a. Someone built this house 200 years ago.
This house was built 200 years ago
b. A thief stole my purse.
My purse was stolen
c. The police will arrest the robbers.
The robbers will be arrested (by the police)
d. They produce cars in this factory.
Cars are produced in this factory
e. They serve breakfast at eight o’clock every day.
Breakfast is served at eight o’clock every day
f. People throw away tones of rubbish every day.
Tones of rubbish are thrown away every day
g. They make coffee in Brazil.
Coffee is made in brazil
h. Someone stole Jim’s bike last night.
Jim’s bike was stolen last night

6. Rewrite these sentences in the passive voice.
a. They will <a id="FALINK_1_0_0" class="FAtxtL" href="#">build</a> a new bridge next year.
A new bridge will be built next year
b. Brian Brody directed The Ultimate Space Adventure.
The ultimate space adventure was directed by Brian Brody
c. Pierre Matie will design her costume.
Her costume will be designed by Pierre Matie
d. Someone found my wallet.
My wallet was found
e. One of the students broke the window.
The window was broken (by one of the students)
f. They will deliver my computer on Monday.
My computer will be delivered on monday
g. Mary invited Paul to her birthday party.
Paul was invited to Mary’s birthday party (by her)
h. British astronomers discovered a new planet.
A new planet was discovered (by British astromers)

7. Form the question.
a. Paper is made from wood.
Is paper made from wood ?
b. The telephone was invented by Mr Bell.
Was the telephone invented by Mr.Bell?
c. This picture was painted by Peter.
Was the picture painted by peter?
d. The thieves will be arrested by the police.
Will the thieves be arrested by the police?

Very well done! I am not a teacher but am from UK and English is my first language.

I'm looking for a "teacher" to correct these exercises.... Thanks!

Change the following sentences into passive sentences using the words in brackets.
a. We sell tickets for all shows at the Box Office. (Tickets for all shows/sell/at the Box Office)
Tickets for all shows are sold at the box office
b. Thomas Edison invented the electric light bulb. (The electric light bulb/invent/by Thomas Edison)
The electric light bulb was invented by Thomas Edison.
c. Someone painted the office last week. (The office/paint/last week)
The office was painted last week.
d. Several people saw the accident. (The accident/see/by several people)
The accident were was seen by several people. 
e. Where do they make these video recorders? (Where/these video recorders/make)
Where are these video recorders are made?
Rewrite these sentences in the passive voice.

a. Someone built this house 200 years ago.
This house was built 200 years ago
b. A thief stole my purse.
My purse was stolen
c. The police will arrest the robbers.
The robbers will be arrested(by the police)
d. They produce cars in this factory.
Cars are produced in this factory
e. They serve breakfast at eight o’clock every day.
Breakfast is served at eight o’clock every day
f. People throw away tones tons of rubbish every day.
Tones Tons of rubbish are is thrown every day
g. They make coffee in Brazil.
Coffee is made in brazil
h. Someone stole Jim’s bike last night.
Jim’s bike was stolen last night

6. Rewrite these sentences in the passive voice.
a. They will build a new bridge next year.
A new bridge will be built next year
b. Brian Brody directed The Ultimate Space Adventure.
The Ultimate Space Adventure was directed by Brian Brody. 
c. Pierre Matie will design her costume.
Her costume will be designed by Pierre Matie
d. Someone found my wallet.
My wallet was found.
e. One of the students broke the window.
The window was broken (by one of the students)
f. They will deliver my computer on Monday.
My computer will be delivered on Monday
g. Mary invited Paul to her birthday party.
Paul was invited to mary’s birthday party (by her)

Paul was invited by Mary, to her birthday party.

h. British astronomers discovered a new planet.
A new planet was discovered (by British astronomers)

7. Form the question.
a. Paper is made from wood.
Is paper made from wood?
b. The telephone was invented by Mr Bell.
was the telephone invented by Mr. Bell?
c. This picture was painted by Peter.
Was the this picture painted by peter?
d. The thieves will be arrested by the police.
Will the thieves be arrested by the police?

Very well done. Just remember to capitalize proper nouns. Other than that, there were only small mistakes. Great work.