Pictures:

If the color of the White house is white, what is the color of a green house?

A greenhouse is transparent because its walls are made of glass.

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When is hair like a sink full of dirty dishes?

When it is disheveled.

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Why do people in the Czech capital feel priviledged?

They're used to their Prague-ative.

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What kind of tea always tells the truth?

Honest Tea.

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How did the English teacher teach the class spelling?

She cast them under her spell.

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What security related word has a sword in it?

Password.

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How are governments sometimes similar to sunglasses?

Both of them can be polarized.

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What part of a car is similar to these wooden dashes?

The dashboard.

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What can you take when you're tired?

You can take a walk, a break, a nap, a rest, a vacation, or a deep breath.

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What is it called when someone gets tired because they are overweight?

Fatigue

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How did Oedipus feel after he found out what he had done?

He felt like an Oedipus wreck.

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What do you call a retired explorer?

An ex-plorer.

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