问题补充:
I don’t know what of students in that school is, but you can see there are of bikes and e-bikes outside the gate.
A. a number, the number
B. a number, a number
C. the number, a number
D. the number, the number
答案:
A. a number, the number
B. a number, a number
(答案→)C. the number, a number
D. the number, the number
解析:the number of 表示…数字,a number of 表示大量的,故选C