问题补充：
根据课文原文，填入所缺内容。
★ It was not immediately obvious that water was 1the development of life.
★ This produced to be fundamental to2a chain reaction, which made it possible for life to develop.
★ I earned my passage by working as an unpaid hand, which accounted for my appearance3managed to catch sight of.
★ When they crossed the Rocky mountain, they 4some mountain goats and even a grizzly and an eagle.
★ Many of them have a gift for5riding wild horses and can win thousands of dollars.
答案：
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