A.They should submit a report of their needs and goals. B.They should provide food for the local communities. C.They should offer all baby animals to their poor neighbors. D.They should help other families the way they have been helped.
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参考答案:
举一反三
【简答题】They were ________ in their scientific research, not knowing what happened just outside their lab. A) submerged B) drowned C) immersed D) dipped