"Wu" can be translated to many different words in Mandarin, it depends on the specific linguistic context. Please provide the complete sentence.

你翻译的很棒！The second sentence can also be translated as 他们因为（他们的）邻居的行为发生了争执。

我明天必须要去伦敦

Both of them refer to "dog", the “犬” is more often used as written language, while the "狗" is more often used as oral language. Actually, the "犬" was first used by ancient Chinese to refer to dog. People use "狗" more often now.

Wǒ qù kànshūle 我去看书了 I'm going to read the book now. Wǒ huì kànshū 我会看书 The sentence has two meanings: (1) I have the ability to read books; (2) I will read the book. The exact meaning can only be determined in a specific context.

go shopping：逛街（guang jie）；购物（gou wu） I like going shopping：我喜欢逛街

乐队 由一群共同演奏的音乐家组成的团队