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Air pollution will remain a problem for a long time. we’ve done a lot to solve it.

A.because B.since C.though D.if

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阅读短文,然后根据内容回答所提问题。

Look it up!

Here are two articles from an encyclopaedia.

Da Vinci, Leonardo

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The ostrich

Living 1.

? Be found in nature in Africa and raised all over the world.

Looks

? It has long legs, a big body with small wings, a long 2., and a long beak.

? Its wings help a lot with balance while running 3..

? The ostrich is a big bird that grows to 9 feet4.

Abilities

? The ostrich’s legs are 5. enough to kill his enemies.

? Its high speed can help it 6. away from any danger.

Food and qualities

? The ostrich lives on a lot of things, 7. plants, insects and small animals.

? Ostriches live in groups to 8. their eggs.

Fun facts

? The ostrich 9. itself by lying down and putting its head and neck flat on the ground.

? The ostrich has powerful 10. with 4 inch long claws.

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