19.请听一段对话,对话后你将听到五个问题,请根据对话内容选出正确答案,将其标号在答题卡上涂黑.对话和问题读两遍.
21.A.London. B.Hong Kong. C.Los Angeles.
22.A.9 hours. B.12 hours. C.10 hours.
23.A.Her mother. B.Her uncle. C.Her friend.
24.A.3 days. B.4 days. C.2 days.
25.A.In the river. B.In the swimming pool. C.In the Pacific Ocean.