_____________________________ (要花费很多时间和精力) to get an exhibition ready. (take)

I (花费)________ nearly 8000 yuan on a motor car last month.

我要花费10分钟的时间步行去上学。（It takes sb....to do...)

它要花费我至少15分钟来洗刷。

It ____ ______ less than fifteen minutes____ _____ .

The garden was transformed at great ______ (花费).