燃烧吧猪五花
1.任何成功都要付出代价anysuccess_coming___ata _price___.2.我经常想起我的老同学ioften__think___of___myoldclassmates.
jasmine7927
1）volunteeredtodosth.例：Shevolunteeredtoteachintheschool.她自愿在学校教书。2）ofon'sownaccord例：Onhermother'sbirthday,Betsydidthehouseworkofherownaccord.母亲过生日那天，贝茜主动做家务。3）ofone'sownfreewill例：Weshouldobserveallregulationsofourownfreewill.我们应该自觉遵守各项规定。
