选单词，将短文补充完整
It has no (colour／coat)or (sheep／shape)．It has no (smell／small)or (taste／paste)．We cannot see it，but we can (fell／feel)it．It is (anywhere／everywhere)．It is (important／import)to all people．It is also important to animals and (plants／plane)．We all(have／need)it to keep us alive．What is it? It is (air／hair)．