我喜欢在披萨上多加一层芝士配料。

I like to add extra cheese ___topping on my pizza.

我们爬了三个小时才到达山的最高点。

It took us three hours to reach the ___top of the hill.

油罐快满了，不用再加了，避免超过最高线。

The oil tank is almost full, no need to keep ___topping it up to avoid overflow.