完成句子（共5小题；每小题1分，满分5分）
1．中国人正在尽自己的一份力以解决这些环境问题。
People within China _______ _______ _______ ____ to solve these environmental problem.
2．他们很关心关于培训的规定。
They are concerned about the rules _____ _____ ______ training.
3．作为世界第三长河，长江的环境问题已经引起了国内外的关注。
As the third longest river in the world, the health of the Yangtze River ___________ ___________ ___________ both in China and abroad.
4．如今许多人把这一变化归咎于二氧化碳等气体。
Today many people ___________ this change ___________ gases such as carbon dioxide.
5．第一只成功地用成年动物的细胞克隆出的哺乳动物是多利羊。
The first mammal ___________ ___________ ___________ successfully from an adult cell was Dolly the sheep.