问题
____________ 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;
B:The number of, bigger and bigger
C:A number of, more and more
D:A number of, bigger and bigger;
正确答案是：
