TO/ BEGIN/ WASH/ DAVID/ HIS/ STUDY/ HAVE/ AFTER/ CLOTHES

46. to/ begin/ wash/ David/ his/ study/ have/ after/ clothes. A. After David had washed his clothes, he began to study. B. After David washed his clothes, he begins to study. C. After David has washed his clothes, he began to study. D. After David washed his clothes, he had begun to study.