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1
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The mail is usually delivered to Bob's apartment
around eleven o'clock.
→ The passive is used because it is
unknown exactly who delivers the mail.
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2
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A: That's a pretty picture.
B: Yes. It was drawn
by my eight-year-old son.
→ The
passive is used with a by-phrase. The focus of attention is on the picture.
The by-phrase includes important information. The active could also be usd:
"Yes. My eight-year-old son drew it!'
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3
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Our
classroom building was built in the 1950s.
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4
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Coffee is grown in Brazil.
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5
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A: These
tomatoes are delicious!
B: Yes.
They taste so much better than the ones you can get in the grocery store. These
tomatoes were grown by my uncle in his greenhouse.
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6
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Airplane travel is unpredictable. Yesterday Anna's flight was
delayed for seven hours. That's a long time to spend in an airport waiting
for your plane to leave.
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7
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We can't
go to the school play tonight. All the tickets have already been sold.
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8
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"Thailand" means "land of the free." The country
of Thailand has never been ruled by a foreign power.
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9
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One of the
most significant inventions in the history of civilization was the wheel.
It was invented around five thousand years ago. It allowed people to pull
things in carts instead of carrying everything on their backs or in their
arms.
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10
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The invention of the printing press changed the world because it
allowed many people instead of few to have copies of books. It was invented
by Johannes Gutenberg around 1440. Before that, books were copied by hand.
Writing books by hand was a slow process.
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