来自单德根的问题
Doyouremember___toDr.Henryduringyourlastvisit?AtobeintroducedBbeingintroducedChavingintroducedDtohaveintroduced
Doyouremember___toDr.Henryduringyourlastvisit?
AtobeintroducedBbeingintroduced
ChavingintroducedDtohaveintroduced

