Doctors believe only small number of people in the danger of getting the disease.A. a; i

问题补充：

Doctors believe only small number of people in the danger of getting the disease.

A. a; is

B. \; is

C. a; are

D. the; are

答案：

A. a; is

B. \; is

(答案→)C. a; are

D. the; are

解析：考察固定词组和主谓一致。第一空是固定词组a number of修饰可数名词复数，后面的谓语动词用复数形式。故C正确。