___ important air is to living things! a.what b.what an c.what a d.how

___ important air is to living things! a.what b.what an c.what a d.how This is very important,___ ___? It is important to take indoor air pollution seriously. 英语二选一选择题.Air and water ( ) important.【is；are】 句型转换 The air today is very clean.The air today is ___ ___ clean. the information is important. 的感叹句the information is important.___ ___ information it is! 同义句转换：Which thing is the most important?He asked ___ ___ ___the most important. the air in the open air is very ___ many people like going there To learn English well is very important for us.改为同义句 ___ ___very important for us___ ___ ___ To keep healthy is very important.(改为同意句) ___ __To keep healthy is very important.(改为同意句)___ ___ very important to keep healthy. How important It is to limit air and water pollution 句子有错吗 Rice,air and water ( )all important for us is or are Water and air ( ) important.A.has B.is C.have D.are _____ important air is to living things!A.howB.what anC.what a D.what Clean air is important to good health.请问to good health是什么成分? But air is important in many other ways-ways that are not always widely know意思 Air is so important for us.We can not live________(with)it. how important air is to human being用what 还是how