single-decker造句

1、They go to work by car, on green single-decker buses.
他们乘汽车去上班，在绿色single - decker公共汽车。

2、In the past, there were only single-decker buses. Nowadays, some buses are double-decker buses.
在过去，只有单层公车，而现在，很多都是双层的公交车。

3、In the past, their were only single-decker buses.
过去只有单层公交车。