下面各选项,一定为互质数的一组是( ) A . 质数与合数 B . 奇数与偶数 C . 质数与质数 D . 偶数与偶数 答案:C-Excuse me. Could you tell me _________? -Sure. I bought them in a video shop on River Road.A. where you buy the CDs B. where you bought the CDsC. how you buy the CDs D. how you bought the CDs