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27. Do you know _____________ ?
A. when the train leaves the station B. when does the train leave the station
C. when will the train leave the station
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26. Sue could play ___________ piano at the age of four.
A. a B. the C. ²»Ìî
27. Do you know _____________ ?
A. when the train leaves the station B. when does the train leave the station
C. when will the train leave the station