—Mum, would you please buy me an MP5 player?
—Mum, would you please buy me an MP5 player?
—If you can help do the dishes the whole vacation, you _______ have one as a reward．
A. must B. need C. would D. shall
—If you can help do the dishes the whole vacation, you _______ have one as a reward．
A. must B. need C. would D. shall
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