单项选择题
A.To irritate them. B.To teach them a lesson. C.To relieve her feelings. D.To show her courage.
A.The role of travel agents. B.The way people travel. C.The number of last-minute bookings. D.The prices of polar expeditions.
A.their students work harder B.they recruit the best students C.their classes are generally smaller D.they give students more attention