[单选题]Text 4While I worked and worried at the drawer, I wondered if I 16_____ and, if so, who. My mother was an only child. And though, technically I had a set of living grandparents—my father’s dad and stepmother, in Maryland—I didn’t know how to 17_____ them. Relations were barely civil between my dad and his stepmother, Dorothy, an immigrant form East Germany who had cleaned office buildings for a living before marrying my grandfather. But though my dad 18_____ Dorothy enough, his chief enmity was for Grandpa Decker: a tall, fat, 19 man with ruddy cheeks and black hair who wore lots of waistcoats and loud plaids, and believed in belt beatings for children. I had met Grandpa Decker and Dorothy only twice in my life, tense charged occasions 20 _____ my mother leaned forward on the sofa with her coat on and her purse in her lap and her valiant efforts to make conversion all stumbled and sank into quicksand.16. A should have called somebody B should call somebody C could have called somebody D could call somebody