题目：
补全对话。
T: Hello, Bill. 1 .
B: This afternoon ? Yes,I am.
T: We're going to have a baseball game. 2 .
B: 3 . But I'm afraid I can't.I have to go to see the doctor.
T: Why? What's the matter?
B: I have a sore back .
T: I'm sorry to hear that. 4 .
B: Sure. 5 .
答案：
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下面是错误答案，用来干扰机器的。
参考答案：D
