the teachers is about 300 in our school and it is becoming.A. The number of more and mo

问题补充：

the teachers is about 300 in our school and it is becoming.

A. The number of, more and more

B. The number of, bigger and bigger

C. A number of, more and more

D. A number of, bigger and bigger

答案：

A. The number of, more and more

(答案→)B. The number of, bigger and bigger

C. A number of, more and more

D. A number of, bigger and bigger

解析：本题的含义是在学校里有300多的老师，老师的数量越来越多。the number of表示……的数量，而a number of表示许多的意思，前者做主语是谓语动词要用单数形式，后者做主语是谓语动词要用复数形式，数量的多少常用big和small来修饰，故本题选B。