She promised her parents to write _______ while she was away.

She promised her parents to write _______ while she was away.
A、other day
B、another day
C、every other day
D、any other
【正确答案】：C
【题目解析】：other day几天前；another day改天；every other day每隔一天；any other其他的句意：她答应她父母在她不在的时候每隔一天给她写信。