the air is so_____that the smoke is rising straight upA calmB silentC stillD quiet区别是什么?

The air is The air is c( ) the air is still是什么意思 why air pollution is the most serious? Love Is In The Air 歌词 Is the air fresh?的肯定回答 is the air fresh连词成句 A________ and above us is the air The morning air is cool and the air here is very b___ the air here is very c__. 句型转换 The air today is very clean.The air today is ___ ___ clean. Is the house______?(air-conditioner) 也要写原因哦- -Is the house______?(air-conditioner)也要写原因哦- - The ground is higher;the air is thinner同义句转换------- ------- the ground is,------- -------the air is The wind is b____ hard but the air is cleThe wind is b____ hard but the air is clean. 空气真清新啊!How fresh the air is!what fresh air it is! It is the air,that is a_____us all. the air in the open air is very ___ many people like going there