一定要按顺序吗？

not necessarily

sing,so,sore,in,no,nor,gap,gas,pore,pose,pan,sea,
too much.

sin,sing,sino,sip,so,sop,sore,sea,sag,so,sir,
sap,sear,spare,spore
in,ire,is
no,nor,nare,nap,neap
gap,gas,go,grin
are,aero,as,air,are
pan,pig,pose,pore,poe,pea,pie
rap,rip,rape,reap
ear,epi
ore,ope

or ,on
son,soap,singer
age
iron
gain ,gear
pin
earn
nero,near