想一想:我们所学的电话用语有哪些?A: Hello. This is A. May I speak to B, please?C: Hi, A. This is C. Hold on, please.B: Hi, this is B speaking.In the morning we climbed the mountains. What did you do today?Yes, we did. Did you go to see the waterfalls?Useful expressionOn October 1st, we went to Wuyishan by train.What did you do today? In the morning we climbed the mountains.Did you go to see the waterfalls?Yes, we did.