题一：not until he went through real hardship _____ the love we have for our families is important. a. had he realized b. did he realize c. he realized d. he had realized 题二： not once ________ to michael that he could one day become a top student in his class. a. occurred it b. it did occur c. it occurred d. did it occur 题三： “never for a second ,” the boy says, “______ that my father would come to my rescue.”
