7,had a deep voice which set him apart from others in our small town
set在这里是过去式,整个句子在讲述一件过去的事情。表示他现在声音没有这么deep了。^^he had a deep... in our small town这个句子是对的,主句后面加一个非限定性定语从句,这已经是一个完整句子了,但后面没有任何连词的情况下,使用逗号,后面又加了一个句子。犯了了语病,即,在一个句子中出现了两个谓语动词。改正:he had a deep voice, which set himself apart from others in our small town, and meanwhile, he was strong.