History
Miscellaneous
Riddles I
Riddles II
Grammar
100

The telephone ....by Alexander Graham Bell. (invent)

was invented

100

Rio ..... for its Carnaval.(know)

is known

100

What can be seen once in a minute, twice in a moment and never in a thousand years?

The letter "m"

100

I am killed by water. What am I?

The fire

100

Mary invited me.

I was invited by Mary.

200

America .... by Cristopher Columbus. (discover)

was discovered

200

Most volcanoes in the world .... in the Pacific Ocean. (find)

are found

200

What has to be broken before you can use it?

The egg

200

What three numbers (none of which is zero) give the same result whether they’re added or multiplied?

One, two and three.

200

My neighbor buys my food.

My food is bought by my neighbor.

300

The post-it .... by accident. (make)

was made

300

The beaches in Brazil .... by tourists all year round. (visit)

are visited

300

I am bought to eat but I'm not eaten. Who am I?

The spoon

300

Every night I’m told what to do and each morning I do what I’m told. But I still don’t escape your scold. What am I?

The Alarm clock

300

They will reopen the school in August.

The school will be reopened in August.

400

The song "Happy Birthday" .... by a kindergarten teacher. (write)

was written

400

The top-three products that ..... by Brazil are iron, crude petroleum and soy beans. (export)

are exported

400

What's always in front of you but can't be seen?

The future

400

My life can be measured in hours, I serve by being devoured. Thin, I am quick. Fat, I am slow. Wind is my foe. What am I?

The candle

400

You can find these books online.

These books can be found online.

500

Napoleon was once attacked by.....


rabbits

500

Lance Armstrong is a former cyclist. Years ago, he .... of using  performance-enhancing drugs to win the Tour de France. (accuse)

was accused

500

What is cut on the table but is never eaten?

A deck of cards

500

I am taken from a mine, and shut up in a wooden case, from which I am never released, and yet I am used by almost everybody. What am I?

The pencil lead

500

The virus kills thousands of people everyday.

Thousands of people are killed by the virus everyday.

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