单选题 It disgusted him when atheists attacked religion: he thought they were vulgar.

【正确答案】 C
【答案解析】[解析] vulgar意为“粗俗的,粗野的”。C项rough“粗鲁的,粗野的”符合题意。其他三项insulting“侮辱的”,base-minded“低级思想的”,vicious“不道德的,恶毒的”都不正确。