一道初二完形填空
It's easier to go down a hill than to c____ up a hill ,so it is eaier to fall into bad habits(习惯) that into good o____.
Bad habits do not come s_____.They come little by little while people do not n________their danger.Schoolboys first pick up little habits in school and on the streets.When they cannot fonosh their lesson,they c____ from their classmates,.If they see bigger boys smoking,they also want to learn to smoke .When they grow o_____,the habits become s____ serious(严重的) that they can no longer get rid of(去掉) them.From copying ,they fall b____:then they learn to steal,and smoking is bad for their bodies:At last,they become worse and worse.
How n_____ it is that we get rid of the bad habits at the b______.