Question

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.

1. A.
   a number, the number
2. B.
   a number, a number
3. C.
   the number, a number
4. D.
   the number, the number

Answer 1

C
the number of 表示…数字，a number of 表示大量的，故选C