Definition: If a dog barks, it makes loud, short sounds. Level: B2
他们听到外面有狗在叫。
They heard a dog ___barking outside.
每当有陌生人来我们家，它就会叫。
He ___barks whenever there is a stranger in our house.
邻居家的狗整晚都在叫。
The neighbour's dog ___barks all night.
