超市里的购物车装满了她买的食物。

The supermarket ___trolleys were filled with the food she bought.

她推着行李车穿过火车站大厅。

She pushed the ___trolley through the train station hall.

为了方便，我们乘坐电车去了购物中心。

We took the ___trolleys to the shopping center for convenience.