题文
How about buying an iPhone 6s for your birthday？
Oh，maybe it's too expensive，Dad，Do you know？（ ）
| A． |
how much it costs |
| B． |
how much does it cost |
| C． |
how much it cost |
How about buying an iPhone 6s for your birthday？
Oh，maybe it's too expensive，Dad，Do you know？（ ）
| A． |
how much it costs |
| B． |
how much does it cost |
| C． |
how much it cost |
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