Writeacher, I need you to check these sentences to be transformed into the passive. (the last two examples don't belong to the same exercise).

I'm also looking for a short reading comprehension to be included in a test designed for pre-intermediate EFL learners. The activity shouldn't take up more than fifteen minutes.

1) Transform the following sentences into the passive (20 marks)
2) They built the bridge in 1996.
Someone ate my sandwich!
People eat millions of bars of chocolate every day!
3) People speak Spanish in most South American countries
4) They make this computer in Japan.
The thieves stole a lot of things but they didn’t damage the house.
(A lot of things were stolen but the house wasn't damaged.
5) They didn’t invite Bill to their end of the school party (what do you call it?)
6) His friends expect him to be discharged from the hospital tomorrow.
7) He threatened to sack me.
How do the Thoughtpolice manage to make him doublethink?
8) On Christmas Eve I spent time emailing (exchanging) greeting messages
to my friends around the world.

from http://www.esl-lounge.com/level2readwrite.shtml --

I'd take a good look at "Clark Meets Claire" and "Tom's Terrible Weekend" -- and adapt one of them to your needs.

2) They built the bridge in 1996.
The bridge was built in 1996.

Someone ate my sandwich!
My sandwich was eaten by someone.

People eat millions of chocolate bars every day!
Millions of chocolate bars are eaten every day.

3) People speak Spanish in most South American countries.
Spanish is spoken ...

4) They make this computer in Japan.
This computer is made in Japan.

The thieves stole a lot of things but they didn’t damage the house.
(A lot of things were stolen but the house wasn't damaged.) Yes, right.
5) They didn’t invite Bill to their end of the school party (what do you call it?)
Bill wasn't invited to the year-end party.

6) His friends expect him to be discharged from the hospital tomorrow.
He is expected to be discharged ...

7) He threatened to sack me. OK

How do the Thoughtpolice manage to make him doublethink?
"doublethink" is a noun, not a verb - http://www.answers.com/doublethink I'd need to know what you intend to say in order to rephrase this.

8) On Christmas Eve, I spent time sending out email greetings to my friends around the world.