一Mum，1 won the first prize in the singing competition．
—_________!
| A．You are right． | B．You are welcome． |
| C．Do a good job． | D．Thank you． |
一Mum，1 won the first prize in the singing competition．
—_________!
| A．You are right． | B．You are welcome． |
| C．Do a good job． | D．Thank you． |
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