北京时间2008年8月8日20时在北京举行第26届奥运会，这时雅典（东二区）是（     ）

    I can't help but feel ____(concern) about the ____(destroy) of tropical forests. It is one of the most serious environment problems today. From ____ I know, people are damaging thousands of square ____(kilometer) of forests every day. This is killing hundreds of wild animals that live in the forests.

    ____(fortunate), we do nothing but talk about it. We don't do anything ____(protect) the forests. We need to stop people doing it. There should be ____(strong) laws. I think that people who cut ____ forests should go to prison. That's what should happen to people who destroy the forests and kill wildlife.

    In my opinion, we, human beings, must protect wildlife ____ future generations. Hopefully, our children ____(be) more responsible than we are today.

____是最普遍、最常见的调查方法。

全国少年儿童“心中有祖国、心中有他人”（简称“双有”）主题教育活动自1987年开展以来，把爱国主义主题教育放在突出的位置，历经20年不衰。29年来，这一活动从小到大、由弱到强，为加强未成年思想道德建设、培养社会主义事业合格接班人起到了巨大的促进作用，深受广大少年儿童的喜爱，深得社会各界好评。

“双有”活动的宗旨和目标是“一切为了孩子”，着力培养少年儿童的爱国意识、生存意识、群体意识和创新意识，使他们在家庭劳动、尊师重教、技能训练、社会公德方面得到学习和锻炼，全面提高综合素质，健康快乐地成长。

运用所学知识，说说我们应该以怎样的实际行动参加“双有”活动?