——It must be pollution that has led to the increase in cancer.——Not necessarily. In my opinion, a _______ of factors may account for the increase in cancer in this villagE. A、combination B、many C、little D、great deal
A.——Not B. A、combination B、many C、little D、great
【参考答案】
B 解析：句子意为：-肯定是污染导致了癌症的增加。-不肯定的。在我看来，导致的癌症增加的因素在这个村子里____......