a police had decided to allow the concert to proceed in order to avoid further trouble

a police had decided to allow the concert to proceed in order to avoid further trouble
a police had decided to allow the concert to proceed in order to avoid further trouble

a police had decided to allow the concert to proceed in order to avoid further trouble
a police had decided to allow the concert to proceed in order to avoid further trouble
为了避免以后的麻烦,警察已经同意这场音乐会继续举行.

为了避免更多的麻烦，警方已允许音乐会继续进行

如果是一个警察 要用a policeman
如果是说 警方 要用 the police , police force, police authority 等等