课文填空.根据课文原文,填入所缺内容.★ It was not immediately obvious that water was 1 the development of life.★ This produced 2 , which made it possible for life to develop.★ I earned my passage by working as an unpaid 题目和参考答案——青夏教育精英家教网—

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课文填空。
根据课文原文,填入所缺内容.
★ It was not immediately obvious that water was     1     the development of life.
★ This produced   2 , which made it possible for life to develop.
★ I earned my passage by working as an unpaid hand, which   3 .
★ When they crossed the Rocky mountain, they    4   some mountain goats and even
      a grizzly and an eagle.
★ Many of them   5 riding wild horses and can win thousands of dollars.

1. to be fundamental to
2. a chain reaction
3. accounted for my appearance
4. managed to catch sight of
5. have a gift for

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6．________　7．________　8．________　9．________　10．________

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