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[材料题] (1)The ostrich, the largest bird in the world at present, lives in the drier regions of Africa outside the actual deserts. Because of its very long, powerful legs and the floating effect of its extended wings, it is able to run at great speed over considerable distances.(2)The female ostrich normally produces about twenty eggs every rainy season. When the female ostrich begins to lay her eggs, however, she does not begin in her own nest. Instead she goes off in search of the nests of neighboring females and lays two or three eggs in each of them. By the time she has laid eight or nine eggs, she returns and lays the rest in her own nest.(3)Because of the size of the eggs, the female ostrich cannot lay more than one every two days, so it takes her three weeks to finish laying in her own nest. During that period, she spends a lot of time away from her nest looking for food. And while she is off her nest, other females visit it to lay their eggs amongst hers. By the time she is ready to sit on the eggs to hatch t
单项选择题1.We learn from the text that an ostrich can go a long distance at high speed as ______.

A、it is a special kind of bird

B、it lives in large desert areas

C、it has special wings and legs

D、it is the largest bird in the world

  • C

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单项选择题2.The female ostrich would push some of the eggs out of her nest because ______.

A、she can only hatch her own eggs

B、those eggs are unlikely to be hatched

C、those eggs are to be hatched by others

D、she can only hatch a limited number of eggs

  • D

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单项选择题3.The female ostrich lays her eggs in her neighbors' nests most probably because ______.

A、her nest -is not big enough

B、she cannot protect all her eggs

C、she cannot tolerate all her eggs

D、her nest is not comfortable enough

  • D

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单项选择题4.The female ostrich identifies her own eggs by their size and ______.

A、color

B、number

C、shape

D、weight

  • C

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单项选择题5.Normally, in every rainy season, the female ostrich produces about ______.

A、12 eggs in her nest

B、18 eggs in her nest

C、20 eggs in her nest

D、30 eggs in her nest

  • A

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