– A number of students ____ in the dinning hall.
-- Let me count. The number of the students ____ about 400.

– A number of students ____ in the dinning hall.

-- Let me count. The number of the students ____ about 400.

A．are, is            B．is, are            C．are, are           D．is, is

– A number of students ____ in the dinning hall.
-- Let me count. The number of the students ____ about 400.

1. A.
   are, is
2. B.
   is, are
3. C.
   are, are
4. D.
   is, is