题目

在下面一段文字横线处补写恰当的语句，使整段文字语意完整连贯，内容贴切，逻辑严密。每处不超过l5个字。(5分) 二氧化碳是最主要的大气保温气体之一。大气中的二氧化碳浓度升高会导致全球变暖，造成天气干旱或旱涝不均，甚至可能造成海洋水位上升，淹没大量沿海城市，                         。然而，也有研究指出，                   ：比如增加的二氧化碳可以给植物“施肥”，有利于植物的生长。但这必须有个前提词汇运用1. She suggested several ways to ________(使伤心的女孩高兴). 2. ________(由于种种原因), this kind of animal died out.3. The driver ________(收了我5元的出租车钱). 4. Several boys of the group ________(被起诉) fighting in the street.5. I think ________(讲座的门票) too expensive for a common student.6. Your silence is ________(承认) of your guilt.7. He ________(获利) of 5,000 dollars on the deal.8. I think many local people will ________(从中受益) the development of the area.9. The police will look into the case ________(涉及几个孩子的). 10. The equipment is still at the ________(实验) stage.11. ________(科学技术的发展) has made it possbile to perform the operation.12. You are ________(自愿的) to attend the party.