问题描述：
it took me ________to find out the key to the drawer.A.one and half hours.B.one an
it took me ________to find out the key to the drawer.
A.one and half hours.B.one and a half hours.C .one and a half hour
最好能给我讲解下 .
it took me ________to find out the key to the drawer.
A.one and half hours.B.one and a half hours.C .one and a half hour
最好能给我讲解下 .
问题解答：
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