she often spends half an hour ( )the foor every we

问题补充：

she often spends half an hour ( )the foor every week.a;washing b;wash c;to wash并告我为社么

答案：

选a spend + time + (in) doing sth 固定搭配

======以下答案可供参考======

供参考答案1:

正确：a spend some money/time (in）doing/on sth