37.——Wouldyouhavecalledheruphaditbeenpossible?Yes,butI________busydoingmyhomework.A.wasB.wereC.hadbeenD.wouldbe38.Histiredfacesuggestedthathe________reallytiredafterthelongwalk.A.hadbeenB.wasC.beD.shouldbe为什么选a.b