详解
Choice B is the best answer. In the passage, Lady Carlotta is approached by the "imposingly attired lady” Mrs. Quabarl while standing at a train sta-tion (lines 32-35"another ...looks"). Mrs. Quabarl assumes Lady Carlotta is her new nanny, Miss Hope: "You must be Miss Hope, the governess I've come to meet" (lines 36-37"You...admitted"). Lady Carlotta does not correct Mrs. Quabarl's mistake and replies, "Very well, if I must I must" (line 39"Very...to").
Choices A, C, and D are incorrect because the passage is not about a woman weighing a job choice, seeking revenge on an acquaintance, or disliking her new employer.