单项选择题
A.a doctor in Deleville B.a famous doctor C.Agatha Christie D.an ordinary nurse
A.had never met this baby B.had spent a long time studying the baby' s illness C.visited the baby both in Deleville and London D.gave the nurse some advice on, the telephone
A.a dead writer B.the water in Deleville C.a dangerous murderer D.a harmful substance (物质) used to kill pests