阅读下述材料，结合所学知识回答下列问题。

      昨天，1941年12月7日，一个遗臭万年的日子——美利坚合众国遭到了日本帝国主义海军部队突然和蓄谋的进攻。合众国当时同该国处于和平状态，而且，根据日本的请求，当时仍同该国政府和该国天皇进行着对话，对于维持太平洋的和平有所期待。但是，我们整个国家都将永远记住这次对我们进攻的性质。不论要用多长时间才能战胜这次预谋的入侵，美国人民都将以自己正义的力量去取得胜利。美国总统富兰克．——林·罗斯福

下列物质中，属于纯净物的是（　）

原始大气的成分是：水蒸气、氢气、____ 、____、二氧化碳、硫化氢等．

根据句意，用括号内所给单词的正确形式填空。（一空一词）

1.They are organizing the____  (thirty-nine) sports meeting of their school.

2.The house____ (it) is very beautiful, but the river near it is much polluted.

3.The boy's dad was ____ (complete ) shocked when he saw that his son was playing with fire.

4.The news and talk shows may not be very exciting, but we can expect ____  (learn) a lot from them.

5.My grandfather's sunny character has a great ____ (influent) on me in my life.