a  How long does it take to go toschool? 去上学要用多长时间？

It takes about thirty minutes.大约三十分钟。

   Why don’t you ride a bike? 骑自行车怎么样？

That’s a good idea!那是个好主意。

b  How long does it take to go there? 去那里要用多长时间？

It takes about forty-five minutes.大约四十五分钟。

   Why don’t you take the subway?坐地铁怎么样？ 

That’s a good idea!那是一个好主意。

c  How long does it take to go there?去那里要用多长时间？

 It takes about twenty minutes.大约二十分钟。

   Why don’t you take the bus? 坐公共汽车怎么样？

That’s a good idea!那是个好主意。