题文
—Can you tell me ______ Sally will play the piano?
—Yes, at nine o’clock. I think.
| A．if | B．how |
| C．when | D．where |
—Can you tell me ______ Sally will play the piano?
—Yes, at nine o’clock. I think.
| A．if | B．how |
| C．when | D．where |
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