The warning we were given as children an apple a day keeps the doctor away may.i
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The warning we were given as children ________ an apple a day keeps the doctor away may，in fact，have a scientific explanation.
A．that? B．who? C．where? D．which
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【答案】
A
【解析】考查同位语从句。that an apple a day keeps the doctor away是对the warning的解释。