bortion,abstract,abrupt
②bottle,bottom,bounce,bound,boundary
③chain,certain,challenge,champion,chance
④digit,dignity,dilemma,diligent,dim
⑤economy,ecosystem,edge,edit,educate
⑥fail,failure,faint,fair,fairy
单词8
①bow,bowl,boycott,branch ,brand
②neat,necessary,neck,needle,negative
③hammer,habit,habitat,hair,hall
④kill,kick,kilo,kind,king,kingdom
⑤lion,lip,link,liquid,list
⑥press,pretend,pretty,prevent,price
单词9
①serve,servant,serious,sentence,separate
②grass,great,grateful,grave,gravity
③colour,column,comb,combat,combine
④Mars,marsh,mask,mass,mate
⑤offer,office,official,often,oil
⑥promote,pronounce,prop,proper,proof
单词10
①accent,accept,access,accessory,accident
②charge,charger,charity,charm,chat
③employ,empty,enable,enclose,encounter
④heat,heaven,heavy,heel,height
⑤temper,temperature,tempt,temple,temporary
⑥blank,blanket,bleed,blend,bless
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