Volleyball stars must eat _________ and have _________ habits.

A. good; good B. good; well C. well; good D. well; well

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The first breath-taking pictures of the Earth taken from space showed it as a solid ball covered by brown land masses and blue-green oceans. We had never seen the Earth from that distance before. To us, it appeared as though the Earth had always looked that way and always would. Scientists now know, however, that the surface of the Earth is not as permanent (永久的) as we had thought.

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Suggested point:

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