unit 5 canada — “the true north” 课时跟踪检测(九) 课时跟踪检测(九) warming up & reading — language points ⅰ.单词拼写 1.two pieces of luggage/baggage (行李) have gone missing, which makes the woman very sad. 2.there is a national park on the border (边界) between kenya and tanzania. 3.my kids spend hours chatting (聊天) on the phone to their friends. 4.the village is surrounded (包围) by high mountains, but it has no difficulty in communicating with the outside world. 5.the boss is particular about everything, so the worke