◎ 题干
Air pollution has become__________ than ever before. We must do something to stop it.
A.serious B.more serious
C.most serious D.the most serious
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据魔方格专家分析,试题“Air pollution has become__________ than ever before. We must do something to stop it.A.seriousB.more seriousC.most serious D.the most serious…”主要考查了你对  【形容词的比较级,形容词的最高级】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。