thE unDErlinED pArt in thE pAssAgE tElls us______.
A．liFE is likE Cutting nEwspApErs
B．wE CAn't kill two BirDs with onE stonE
C．liFE somEtimEs ChAngEs ComplEtEly
D．it is oFtEn DiFFiCult to mAkE A ChoiCE in our liFE