选词填空platformhow another take enough transferP: Excuse me, Can you tell me1 I can get to Beigongmen station?C: 2 the train to Haidian Huangzhuang station. Then 3 to Line four to get there.P: Do I have to buy4 ticket at Haidian Huangzhuang station?C: No, your IC card is5 .P: By the way, which 6 should I take？S: Your left side platform.P: Thanks a lot.