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