问题描述：
It's not rare in ______that people in______fifties are goning to university for further education.
It's not rare in ______that people in______fifties are goning to university for further education.
A .90s,the B.the 90s,/ C.90s ,their D.the90s
选哪一个呢?为什么?
It's not rare in ______that people in______fifties are goning to university for further education.
A .90s,the B.the 90s,/ C.90s ,their D.the90s
选哪一个呢?为什么?
问题解答：
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