She got angry ________ I could explain why I was late again.

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Some birds are able to ________ winter weather by flying to the south.

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Human beings have five senses ________ the world around them.

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Waste has now become ________ to life and many wild animals are ________.

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A．dangerous; in the danger

B．a danger; in danger

C．danger; in danger

D．a danger; dangerous

Xiao Wang works for a factory ________ makes computers.

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The fact is well known ________ the earth attracts all bodies.

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Mr. Smith, as well as his wife and two sons, ________ to arrive tomorrow.

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You will succeed in the end ________ you give up halfway.

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Though ________, swimming does good to your health.

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________ while you are crossing the street.

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