读表格，选择正确选项完成对话，将序号填在横线上。 Ms Smart: How old are you, Ben? Ben: I’m 1. ________. Ms Smart: How old are you, Sam? Sam: I’m 2. ________. Ms Smart: How old are you, Tom? Tom: I’m 3. ________. Ms Smart: How old are you, Lingling? Lingling: I’m 4. ________. A. ten B. six C. eight D. nine
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