【導(dǎo)讀】1.am,iswas2.3.arewere4.5.beebecame6.7.beginbegan8.9.bitebit10.11.blowblew12.13.buybought14.15.catchcaught16.17.ecame18.19.costcost20.21.cutcut22.dug24.did26.27.drawdrew28.29.drinkdrank30.31.eatate32.33.35.feedfed36.39.flyflew40.43.getgot44.45.wakewoke46.47.wearwore48.49.winwon50.51.writewrote52.