填空题According to the scientists it is the emission of CO(2 by human beings that causes the increases of CO2 levels.
填空题Kyoto agreement is accepted by most of the world’s major polluters of countries.
填空题The industrialized First World countries should take the main responsibility for the emission of CO2.
问答题许多人对考试作弊持否定态度，认为这是不诚实的表现。2.也有人认为考试作弊情有可原。3.你的观点。
单项选择题A．bestB．leastC．mostD．worst
