Sacks were being loaded onto the truck.

人们正在把麻袋装上卡车。

《牛津词典》

He remembered being loaded into an ambulance.

他记得被送上一个救护车。

youdao

Hundreds of camels are being loaded onto lorries.

数以百计的骆驼正被装上运货卡车。

youdao

On a quiet, brief day well into autumn, crossties were being loaded onto flatcars at a dead-end siding.

NEWYORKER: Among Animals and Plants

The new tasks are being loaded on as austerity is forcing the commission to cut its budget too.

WSJ: How the EU Commission Polices Is Critical

And note that we can actually see the goods being loaded in China before the LC is disbursed.

FORBES: Banking Regulation, Yes, But Perhaps Not Stupid Banking Regulation?