Betty and Bob are talking on the telephone. Betty: Hi, Bob. What are you doing? Bob : I'm watching TV. How about you? Betty: I'm doing my homework. Bob : You are a good student, Betty. 你在做什么? 贝蒂和鲍勃在讲电话。 贝蒂：嗨，鲍勃。你在做什么? 鲍勃：我在看电视。你呢? 贝蒂：我在做功课。 鲍勃：贝蒂，你是个好学生。
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